A guide to know and choose engine oil for your car

There is still a lot of doubt as to whether or not to use engine oil for your car. The strict selection criteria help you to buy the right one for your vehicle's engine. Apart from quality, knowledge of this product will guide you in maintaining it properly, especially during oil changes. The meaning of the various signs on the outside of the canister shows the type of oil, but sometimes the choice is made according to its age. Here are 3 criteria to help you choose.

Viscosity indices

Looking at the canister, some numbers and one letter appear as a viscosity index of the style: "10w40", "5w40"... The first number represents the fluidity of the oil at low temperature and the second one represents the viscosity of the oil at high temperature. 100% synthetic oils (5w30 and 5w40): Recent diesel or petrol engines have a recommendation for 5w30 or 5w40. If your car is equipped with a particle filter, it requires 5w30 oil according to its brand, and according to the C1, C2, C3, C4 standard. It makes it easier to start the engine when cold and saves fuel. Semi-synthetic oil (10w40): This is a good level of protection, but you need to change it after 10,000 kilometres of diesel-type travel. The 10w40 also makes it easier to start the engine when cold. Mineral oil (15w40): The 15w40 engine oil is specialised for a petrol car over 12 years old, and for a non-turbo diesel of several kilometres. It is recommended to reduce the oil change time because this type of oil weakens the lubrication characteristics. 

The standards

Usually, the engine oil standards are on the back of the  "ACEA B3/B4", "API CF/DF", "VW 500.01"... These letters and numbers determine the choice of diesel or petrol engine based on the evaluation of its performance level. There are two fundamental solutions: the use is based on the information of the character of the car, and the request for advice from experienced mechanics.


The brands of engine oil also depend on the quality/price and the nature of the product. Depending on the range, the manufacturers give more satisfaction to the suppliers: more quality, more performance with a cost higher. In short, you don't have to choose a brand, but you do need to know which one suits your car and your budget.
The liveliest top rallies in the history of the WRC
Why does F1 refuse to switch to electric?

Plan du site