CN115678646A - Diesel engine oil with ultralow-temperature starting performance - Google Patents
Diesel engine oil with ultralow-temperature starting performance Download PDFInfo
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- CN115678646A CN115678646A CN202210944038.9A CN202210944038A CN115678646A CN 115678646 A CN115678646 A CN 115678646A CN 202210944038 A CN202210944038 A CN 202210944038A CN 115678646 A CN115678646 A CN 115678646A
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- diesel engine
- engine oil
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- oil
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- 239000010710 diesel engine oil Substances 0.000 title claims abstract description 28
- 239000002199 base oil Substances 0.000 claims abstract description 36
- 239000000654 additive Substances 0.000 claims abstract description 19
- 230000000996 additive effect Effects 0.000 claims abstract description 17
- -1 polyol ester Chemical class 0.000 claims abstract description 17
- 229920005862 polyol Polymers 0.000 claims abstract description 11
- 150000002148 esters Chemical class 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 239000002131 composite material Substances 0.000 claims abstract description 7
- 229920000181 Ethylene propylene rubber Polymers 0.000 claims abstract description 6
- 239000004743 Polypropylene Substances 0.000 claims abstract description 6
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims abstract description 6
- 229920001155 polypropylene Polymers 0.000 claims abstract description 6
- 239000003963 antioxidant agent Substances 0.000 claims description 17
- 230000003078 antioxidant effect Effects 0.000 claims description 15
- 239000003795 chemical substances by application Substances 0.000 claims description 14
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical group CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 claims description 9
- YSMRWXYRXBRSND-UHFFFAOYSA-N TOTP Chemical compound CC1=CC=CC=C1OP(=O)(OC=1C(=CC=CC=1)C)OC1=CC=CC=C1C YSMRWXYRXBRSND-UHFFFAOYSA-N 0.000 claims description 9
- 239000010687 lubricating oil Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- IMHQFVGHBDXALM-UHFFFAOYSA-N 2,2-diethylhexanoic acid Chemical compound CCCCC(CC)(CC)C(O)=O IMHQFVGHBDXALM-UHFFFAOYSA-N 0.000 claims description 6
- XZOYHFBNQHPJRQ-UHFFFAOYSA-N 7-methyloctanoic acid Chemical compound CC(C)CCCCCC(O)=O XZOYHFBNQHPJRQ-UHFFFAOYSA-N 0.000 claims description 6
- GVPWHKZIJBODOX-UHFFFAOYSA-N dibenzyl disulfide Chemical compound C=1C=CC=CC=1CSSCC1=CC=CC=C1 GVPWHKZIJBODOX-UHFFFAOYSA-N 0.000 claims description 6
- 239000011701 zinc Substances 0.000 claims description 6
- 229910052725 zinc Inorganic materials 0.000 claims description 6
- 238000013329 compounding Methods 0.000 claims description 5
- 239000010705 motor oil Substances 0.000 claims description 5
- 229920000089 Cyclic olefin copolymer Polymers 0.000 claims description 3
- 229920002367 Polyisobutene Polymers 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229920001577 copolymer Polymers 0.000 claims description 3
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 claims description 3
- FATBGEAMYMYZAF-UHFFFAOYSA-N oleicacidamide-heptaglycolether Natural products CCCCCCCCC=CCCCCCCCC(N)=O FATBGEAMYMYZAF-UHFFFAOYSA-N 0.000 claims description 3
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 claims description 3
- 239000002530 phenolic antioxidant Substances 0.000 claims description 3
- 229920000193 polymethacrylate Polymers 0.000 claims description 3
- XZZNDPSIHUTMOC-UHFFFAOYSA-N triphenyl phosphate Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)(=O)OC1=CC=CC=C1 XZZNDPSIHUTMOC-UHFFFAOYSA-N 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 8
- 238000004140 cleaning Methods 0.000 abstract description 5
- 239000004215 Carbon black (E152) Substances 0.000 abstract description 4
- 229930195733 hydrocarbon Natural products 0.000 abstract description 4
- 150000002430 hydrocarbons Chemical class 0.000 abstract description 4
- 239000003921 oil Substances 0.000 abstract description 4
- 239000004071 soot Substances 0.000 abstract description 4
- 238000003756 stirring Methods 0.000 description 8
- 230000003647 oxidation Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- 239000002253 acid Substances 0.000 description 2
- 239000002518 antifoaming agent Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000005984 hydrogenation reaction Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 150000002978 peroxides Chemical class 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004034 viscosity adjusting agent Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Abstract
The invention discloses diesel engine oil with ultralow temperature starting performance, which comprises the following components in parts by weight: 65-70% of third-class hydrogenated base oil; 8-12% of polyol ester; 5-9% of ethylene propylene rubber ester; 8-12% of a composite additive; 0.2 to 0.5 percent of polypropylene polybasic ester; 10-15ppm of methyl silicone oil. The diesel engine oil is prepared by blending high-quality synthetic hydrocarbon base oil with high viscosity index and an additive with extremely strong functions, so that the excellent low-temperature pneumatic performance is achieved, the base oil is investigated and the oil additive is selected, so that the product has the advantages of outstanding cleaning performance, ultra-strong soot holding capacity, excellent wear resistance and excellent low-temperature starting performance, the maneuvering flexibility of operation in severe cold areas is increased, and the operation stability of equipment in the severe cold areas is guaranteed. The product is superior to the standard of the existing diesel engine, has excellent low-temperature starting performance, effectively improves low-temperature power, reduces power consumption, saves energy, increases the benefit of equipment operation, and fills the blank of the diesel engine oil standard.
Description
Technical Field
The invention relates to the technical field of lubricating oil, in particular to diesel engine oil with ultralow temperature starting performance.
Background
The engine oil, namely engine lubricating oil, can play roles in lubricating, antifriction, auxiliary cooling, temperature reduction, sealing, leakage prevention, rust prevention, corrosion prevention, shock absorption, buffering and the like for the engine. The engine oil consists of base oil and additive. The base oil is the main component of the lubricating oil, the basic properties of the lubricating oil are determined, the additives can make up and improve the deficiency of the base oil in performance, and the additives endow certain new performance and are important components of the lubricating oil.
Diesel engine oil on national defense equipment needs to have lubricating, corrosion-resistant and cleaning and dispersing performances, but cannot be directly started in a severe cold area at minus 40 ℃, needs to be started after being preheated, lacks maneuvering flexibility and affects timely, rapid, maneuvering and lying operation efficiency.
Disclosure of Invention
The invention overcomes the defects of the prior art and provides the diesel engine oil with ultralow temperature starting performance. The diesel engine oil with ultralow-temperature starting performance is prepared by mixing high-quality synthetic hydrocarbon base oil with high viscosity index and an additive with extremely strong function, so that the excellent low-temperature pneumatic performance is achieved, and the product has the advantages of superior cleaning performance, ultra-strong soot containing capacity, excellent wear resistance and excellent low-temperature starting performance through the investigation of the base oil and the selection of the oil additive, the maneuvering flexibility of operation in severe cold areas is increased, and the operation stability of equipment in severe cold areas is ensured.
In order to achieve the purpose, the invention adopts the technical scheme that: the diesel engine oil with ultralow-temperature starting performance is characterized by comprising the following components in parts by weight: 65-70% of three types of hydrogenated base oil; 8-12% of polyol ester; 5-9% of ethylene propylene rubber ester; 8-12% of a composite additive; 0.2 to 0.5 percent of polypropylene polybasic ester; 10-15ppm of methyl silicone oil.
In a preferred embodiment of the present invention, the composite additive comprises: the lubricating oil comprises a viscosity regulator, an antioxidant and an antiwear agent, wherein the viscosity regulator, the antioxidant and the antiwear agent respectively account for 1-2%, 0.3-0.5% and 0.2-2% of the engine oil component.
In a preferred embodiment of the invention, the viscosity regulator is one or a mixture of polyisobutylene, polymethacrylate, olefin copolymer and hydrogenated styrene diene copolymer.
In a preferred embodiment of the invention, the polyol ester is a tetraester of pentaerythritol reacted with a mixture of isononanoic acid and diethyl hexanoic acid, wherein the ratio of isononanoic acid to diethyl hexanoic acid is 3:5.
in a preferred embodiment of the invention, the antiwear agent is selected from one or more of zinc alkyl dithiophosphate, sulfurized isobutylene, dibenzyl disulfide, tricresyl phosphate, triphenyl phosphate and boronated oleamide.
In a preferred embodiment of the invention, the antioxidant is prepared by mixing zinc dialkyl dithiophosphate and a phenolic antioxidant in a mass ratio of 2:1 is prepared by compounding.
In a preferred embodiment of the invention, the antiwear agent is prepared by mixing tricresyl phosphate and sulfurized isobutylene, wherein the tricresyl phosphate and the sulfurized isobutylene are prepared according to the proportion of 5.
In a preferred embodiment of the present invention, the three types of hydrogenated base oils are one or two of 32N three types of hydrogenated base oils or 32NS three types of hydrogenated base oils.
The invention solves the defects in the background art, and has the following beneficial effects:
(1) The product is superior to the standard of the existing diesel engine, has excellent low-temperature starting performance, effectively improves low-temperature power, reduces power consumption, saves energy, increases the benefit of equipment operation, and fills the blank of the diesel engine oil standard. The product standard level meets the quality grade requirement of CF-40W-40 products.
(2) The diesel engine oil with ultralow-temperature starting performance is prepared by blending high-quality synthetic hydrocarbon base oil with high viscosity index and an additive with extremely strong function, so that the excellent low-temperature pneumatic performance is achieved, the base oil is investigated and the oil additive is selected, so that the product has the advantages of superior cleaning performance, ultra-strong soot holding capacity, excellent wear resistance and excellent low-temperature starting performance, the maneuvering flexibility of operation in severe cold areas is increased, and the operation stability of the equipment in the severe cold areas is guaranteed.
(3) The viscosity regulator added in the invention has a long-chain structure, has more interaction points with the three types of hydrogenation base oil molecules, and can well improve the viscosity-temperature performance.
(4) The antioxidant can improve the oxidation stability of the hydrogenated base oil, particularly has a particularly obvious effect on improving three types of 32N hydrogenated base oil, remarkably reduces the increase of the oxidation viscosity of the base oil, effectively controls the increase of the acid value, and reduces the chain transfer of free radicals while decomposing peroxide by compounding the two antioxidants, thereby improving the oxidation resistance of hydraulic oil and reducing the using amount of the antioxidant.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be described in further detail below with reference to specific embodiments. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
The diesel engine oil with ultralow temperature starting performance comprises the following components in parts by weight: 65-70% of three types of hydrogenated base oil; 8-12% of polyol ester; 5-9% of ethylene propylene rubber ester; 8-12% of a composite additive; 0.2 to 0.5 percent of polypropylene polybasic ester; 10-15ppm of methyl silicone oil.
The three types of hydrogenated base oil in the invention is one or two of 32N three types of hydrogenated base oil or 32NS three types of hydrogenated base oil. The polyol ester is a tetraester of pentaerythritol reacted with a mixture of isononanoic acid and diethyl hexanoic acid in a ratio of isononanoic acid to diethyl hexanoic acid of 3:5.
the composite additive comprises: viscosity modifier, antioxidant and antiwear agent, wherein the viscosity modifier, antioxidant and antiwear agent respectively account for 1-2%, 0.3-0.5% and 0.2-2% of the engine oil component. The viscosity regulator is one or a mixture of polyisobutylene, polymethacrylate, olefin copolymer and hydrogenated styrene diene copolymer. The viscosity regulator added in the invention has a long-chain structure, has more interaction points with the three types of hydrogenation base oil molecules, and can well improve the viscosity-temperature performance.
The antioxidant is prepared from zinc dialkyl dithiophosphate and a phenolic antioxidant in a mass ratio of 2:1 is prepared by compounding. The antioxidant can improve the oxidation stability of the hydrogenated base oil, particularly has a particularly obvious effect on improving three types of 32N hydrogenated base oil, remarkably reduces the increase of the oxidation viscosity of the base oil, effectively controls the increase of the acid value, and reduces the chain transfer of free radicals while decomposing peroxide by compounding the two antioxidants, thereby improving the oxidation resistance of hydraulic oil and reducing the using amount of the antioxidant.
The antiwear agent is one or more selected from zinc alkyl dithiophosphate, sulfurized isobutylene, dibenzyl disulfide, tricresyl phosphate, triphenyl phosphate and boronized oleamide. The antiwear agent is preferably prepared by mixing tricresyl phosphate and sulfurized isobutylene, wherein the tricresyl phosphate and the sulfurized isobutylene are prepared according to the proportion of 5.
A preparation method of diesel engine oil with ultralow temperature starting performance comprises the following steps:
s1, adding three types of hydrogenated base oil, polyol ester, ethylene propylene rubber ester, polypropylene polyol ester and methyl silicone oil into a reaction kettle, and uniformly stirring at the stirring speed of 200-400r/min for 30-40min;
s2, adding a viscosity regulator, an antioxidant and an antiwear agent into the S1 in sequence, and reacting for 1-2h at 60 ℃;
and S3, adding the antifoaming agent into the S2, continuing stirring for 30min at the stirring speed of 400-500r/min, and filtering at 4 stages to obtain the diesel engine oil with ultralow-temperature starting performance.
Example one
Adding 70 parts of three-class hydrogenated base oil (40 parts and 30 parts of a mixture of 32N three-class hydrogenated base oil or 32NS three-class hydrogenated base oil, respectively), 10 parts of polyol ester, 9 parts of ethylene propylene rubber ester, 0.5 part of polypropylene polyol ester and 0.2 part of methyl silicone oil into a reaction kettle, and uniformly stirring at the stirring speed of 200-400r/min for 30-40min; then adding 10.3 parts of compound additive (3.6 parts of viscosity regulator, 4.3 parts of antioxidant and 2.4 parts of antiwear agent) into the reactant, and reacting for 1-2h at 60 ℃; and adding 0.5 part of antifoaming agent, continuously stirring for 30min at the stirring speed of 400-500r/min, and then filtering and cooling for 4 stages to obtain the diesel engine oil with ultralow temperature starting performance in the embodiment. The physical and chemical properties of the diesel engine oil obtained by the test are shown in the table 1:
table 1 shows the physical and chemical properties of diesel engine oil of example 1 of the present invention
The product is superior to the standard of the existing diesel engine, has excellent low-temperature starting performance, effectively improves low-temperature power, reduces power consumption, saves energy, increases the benefit of equipment operation, and fills the blank of the diesel engine oil standard. The product standard grade meets the quality grade requirement of CF-40W-40 products. The diesel engine oil with ultralow-temperature starting performance is prepared by mixing high-quality synthetic hydrocarbon base oil with high viscosity index and an additive with extremely strong function, so that the excellent low-temperature pneumatic performance is achieved, and the product has the advantages of superior cleaning performance, ultra-strong soot containing capacity, excellent wear resistance and excellent low-temperature starting performance through the investigation of the base oil and the selection of the oil additive, the maneuvering flexibility of operation in severe cold areas is increased, and the operation stability of equipment in severe cold areas is ensured.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. The diesel engine oil with ultralow-temperature starting performance is characterized by comprising the following components in parts by weight: 65-70% of third-class hydrogenated base oil; 8-12% of polyol ester; 5-9% of ethylene propylene rubber ester; 8-12% of a composite additive; 0.2 to 0.5 percent of polypropylene polybasic ester; 10-15ppm of methyl silicone oil.
2. The ultra-low-temperature-start diesel engine oil as set forth in claim 1, wherein: the composite additive comprises: the lubricating oil comprises a viscosity regulator, an antioxidant and an antiwear agent, wherein the viscosity regulator, the antioxidant and the antiwear agent respectively account for 1-2%, 0.3-0.5% and 0.2-2% of the engine oil component.
3. The ultra-low-temperature-start diesel engine oil according to claim 2, characterized in that:
the viscosity regulator is one or a mixture of polyisobutylene, polymethacrylate, olefin copolymer and hydrogenated styrene diene copolymer.
4. The ultra-low-temperature-start diesel engine oil according to claim 1, characterized in that: the polyol ester is a tetraester of pentaerythritol reacted with a mixture of isononanoic acid and diethyl hexanoic acid, wherein the ratio of isononanoic acid to diethyl hexanoic acid is 3:5.
5. the ultra-low-temperature-start diesel engine oil according to claim 2, characterized in that: the antiwear agent is selected from one or more of zinc alkyl dithiophosphate, sulfurized isobutylene, dibenzyl disulfide, tricresyl phosphate, triphenyl phosphate and boronated oleamide.
6. The ultra-low-temperature-start diesel engine oil according to claim 2, characterized in that: the antioxidant is prepared from zinc dialkyl dithiophosphate and a phenolic antioxidant in a mass ratio of 2:1 is prepared by compounding.
7. The ultra-low-temperature-start diesel engine oil according to claim 2, characterized in that: the antiwear agent is prepared by mixing tricresyl phosphate and sulfurized isobutylene, wherein the tricresyl phosphate and the sulfurized isobutylene are prepared according to the proportion of 5.
8. The ultra-low-temperature-start diesel engine oil as set forth in claim 1, wherein: the three types of hydrogenated base oil are one or two of 32N three types of hydrogenated base oil or 32NS three types of hydrogenated base oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210944038.9A CN115678646A (en) | 2022-08-05 | 2022-08-05 | Diesel engine oil with ultralow-temperature starting performance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210944038.9A CN115678646A (en) | 2022-08-05 | 2022-08-05 | Diesel engine oil with ultralow-temperature starting performance |
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| Publication Number | Publication Date |
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| CN115678646A true CN115678646A (en) | 2023-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210944038.9A Pending CN115678646A (en) | 2022-08-05 | 2022-08-05 | Diesel engine oil with ultralow-temperature starting performance |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0588561A1 (en) * | 1992-09-14 | 1994-03-23 | Oronite Japan Limited | Low phosphorous engine oil compositions and additive compositions |
| US20030022798A1 (en) * | 2001-06-15 | 2003-01-30 | Bell Ian A. W. | Lubricating oil compositions |
| CN101851546A (en) * | 2009-03-31 | 2010-10-06 | 中国石油化工股份有限公司 | Refrigerating machine oil composition |
| CN104845712A (en) * | 2015-04-27 | 2015-08-19 | 苏州劲元油压机械有限公司 | High-performance anti-wear hydraulic oil and preparation method thereof |
| CN111849594A (en) * | 2020-07-16 | 2020-10-30 | 天津内燃机研究所（天津摩托车技术中心） | Diesel engine oil and preparation method thereof |
| CN112725058A (en) * | 2019-10-14 | 2021-04-30 | 中国石油化工股份有限公司 | Low-temperature-resistant diesel engine oil composition |
| CN113913232A (en) * | 2020-07-08 | 2022-01-11 | 中国石油化工股份有限公司 | Energy-saving low-ash long-oil-change-period diesel engine oil and preparation method and application thereof |
| CN114717041A (en) * | 2021-01-06 | 2022-07-08 | 中国石油天然气股份有限公司 | Diesel engine oil composition with long oil change period |
-
2022
- 2022-08-05 CN CN202210944038.9A patent/CN115678646A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0588561A1 (en) * | 1992-09-14 | 1994-03-23 | Oronite Japan Limited | Low phosphorous engine oil compositions and additive compositions |
| US20030022798A1 (en) * | 2001-06-15 | 2003-01-30 | Bell Ian A. W. | Lubricating oil compositions |
| CN101851546A (en) * | 2009-03-31 | 2010-10-06 | 中国石油化工股份有限公司 | Refrigerating machine oil composition |
| CN104845712A (en) * | 2015-04-27 | 2015-08-19 | 苏州劲元油压机械有限公司 | High-performance anti-wear hydraulic oil and preparation method thereof |
| CN112725058A (en) * | 2019-10-14 | 2021-04-30 | 中国石油化工股份有限公司 | Low-temperature-resistant diesel engine oil composition |
| CN113913232A (en) * | 2020-07-08 | 2022-01-11 | 中国石油化工股份有限公司 | Energy-saving low-ash long-oil-change-period diesel engine oil and preparation method and application thereof |
| CN111849594A (en) * | 2020-07-16 | 2020-10-30 | 天津内燃机研究所（天津摩托车技术中心） | Diesel engine oil and preparation method thereof |
| CN114717041A (en) * | 2021-01-06 | 2022-07-08 | 中国石油天然气股份有限公司 | Diesel engine oil composition with long oil change period |
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Application publication date: 20230203 |