What does GF5 on engine oil mean?

2 Answers
SanMadelyn
07/24/25 12:58am
GF5 on engine oil refers to the oil's grade. GF5 specification oil can improve fuel economy by at least 0.5% compared to GF4 oil of the same viscosity grade, effectively reducing emissions and further protecting the environment. Engine oil is the lifeblood of an engine; without it, the engine cannot operate properly. In the engine, oil not only lubricates but also cleans, seals, cushions, prevents rust, and dissipates heat. Over time, the performance of engine oil degrades, so it needs to be replaced regularly. When the engine is running, the oil forms a protective film on the surfaces of various engine components, preventing direct contact and friction between them. If engine components directly contact and rub against each other, it can generate a significant amount of heat instantly, causing considerable damage to the engine.
Was this review help?
20
5
Share
VanGianna
08/10/25 8:42pm
The GF-5 marked on the engine oil bottle is actually quite an important standard. When I change my oil myself, I specifically researched it—it's a gasoline engine lubricant certification standard established by the international organization ILSAC. GF-5 primarily focuses on fuel economy and environmental performance, requiring the oil to reduce engine friction for better fuel efficiency while also protecting exhaust treatment systems from clogging. My car's old maintenance manual mentioned that compared to the older GF-4 standard, GF-5 has higher requirements for oxidation resistance and cleaning performance, making it especially friendly to turbocharged engines. Nowadays, most mainstream engine oils on the market meet this standard, so looking for the GF-5 label when choosing oil can help avoid buying inferior products. However, it's important to note that this standard only applies to gasoline vehicles—diesel vehicles require a different certification system.
Was this review help?
9
3
Share
Expand All
More Forum Discussions

What does the BMW X5 M Sport Package mean

m sport package is only available for BMW models. The m sport package includes front and rear bumpers, side skirts, wheels, steering wheel, etc. The m sport package is actually a more sporty exterior and interior package. The most attractive part of the M package is the M steering wheel, with only some differences in functional buttons. The thick steering wheel offers an excellent grip and easily ignites the desire to drive. The m sport package, also known as the MSportPackage, as the name suggests, changes the appearance: fender m logo, m aerodynamic exterior package, m sport steering wheel with great feel and design, aluminum interior, handsome Estoril Blue, and Alcantara seats full of combat feel. Although facing countless luxury suits and fashion suits in the past few years, the appearance of the M sport package undoubtedly injected a dose of adrenaline into BMW models, but personally, it feels like BMW may have over-consumed the letter M.
17
3
Share

Direction of Tire Lug Nuts?

The direction for tightening or loosening tire lug nuts depends on the vehicle type. For passenger cars, turning right (clockwise) tightens the nut, while turning left (counterclockwise) loosens it. However, for large trucks, the lug nuts on the left (driver's side) and right sides differ. The left side uses reverse threads, meaning tightening is achieved by turning in the direction opposite to the vehicle's forward motion (loosening is in the direction of reverse). The right side uses standard threads, where tightening is in the direction of forward motion. Below is an introduction to related aspects of automotive tires: 1. Shock Absorption: Automotive tires are crucial components that directly contact the road surface. Together with the suspension system, they help mitigate shocks encountered during driving. 2. Comfort: They ensure good ride comfort and smooth driving, maintain excellent adhesion between the wheels and the road surface, enhance traction, braking, and off-road capability, and bear the vehicle's weight.
5
0
Share

Does the LaCrosse have air suspension?

The LaCrosse does not have air suspension. The front suspension type of the LaCrosse is MacPherson strut independent suspension, and the rear suspension type is multi-link independent suspension. MacPherson strut independent suspension: The MacPherson strut suspension is one of the most widely used front suspensions for passenger cars in the world today. It consists of a coil spring, shock absorber, and lower control arm, with most models also including a stabilizer bar. The MacPherson strut suspension has a simple structure, making it lightweight and responsive. Multi-link suspension system: The multi-link suspension system consists of control arms, rear positioning arms, upper arms, lower arms, and front positioning arms. The control arms can adjust the rear wheel toe-in. The advantages of the multi-link suspension are its simple construction, light weight, and reduced space occupied by the suspension system.
8
2
Share

What are the reasons for the failure of the car air conditioning compressor clutch to engage?

Detailed reasons and solutions for the failure of the car air conditioning compressor clutch to engage are as follows: 1. Blockage in the high-pressure pipeline or clogged liquid storage dryer: The high-pressure pipeline may be deformed due to external force, causing blockage, or the liquid storage dryer may be clogged. There is a noticeable temperature difference between the inlet and outlet of the dryer. If the dryer is clogged, the temperature difference between the inlet and outlet will increase, and the more severe the blockage, the greater the temperature difference. Solution: Replace the high-pressure pipeline or the clogged liquid storage dryer, and clean the condenser if necessary. 2. Compressor damage: The electromagnetic clutch of the compressor cannot engage properly, resulting in slippage, and the compressor's drive belt may also slip, producing noticeable mechanical noise during operation. Solution: Adjust the gap of the electromagnetic clutch according to the relevant manual or replace the electromagnetic clutch or compressor.
6
3
Share

What is the range of Li Auto vehicles?

In pure electric mode, the Li ONE can achieve a range of up to 180 kilometers. Below is relevant information about Li Auto: 1. Introduction: Li Auto is a premium smart electric vehicle brand with the mission of creating a mobile home and a happy home. The company was founded in July 2015, headquartered in Beijing, and has its own manufacturing base located in Changzhou, Jiangsu. The founder of Li Auto, Li Xiang, is a renowned Chinese serial entrepreneur who previously established Autohome, the world's most visited automotive website. 2. Manufacturing Base: Li Auto possesses its own production qualifications and has built its own factory in Changzhou, Jiangsu. The Li Auto Changzhou base is designed with an annual production capacity of 100,000 vehicles, covering four major workshops: stamping, welding, painting, and assembly. It employs numerous advanced technologies and equipment to ensure that the manufacturing quality of the Li ONE meets luxury brand standards.
10
1
Share

Is It Necessary to Clean Sludge in a New Car?

Sludge cleaning in a new car is necessary because engine sludge may block the oil passages of the engine or even clog the oil pump, leading to severe consequences. Effects of Sludge: Sludge is a dark brown or black viscous substance formed during engine operation. It adheres to critical internal parts of the engine, hindering normal lubrication. Types of Sludge: Sludge can be categorized into high-temperature sludge and low-temperature sludge. The primary cause of high-temperature sludge is inferior engine oil, which polymerizes into larger molecules during high-temperature operation, thickening the oil and eventually forming sludge. Low-temperature sludge formation depends on fuel. During low-temperature or short-distance operation, moisture and fuel in the crankcase may not fully evaporate, leading to emulsification in the engine and sludge formation.
20
2
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.