Diesel oil

The use of oils formulated for diesel cars cannot be used in gasoline cars. In the past, diesel engine oils were used because of their higher viscosity, which was a bad reason. Engine oils turn black due to their cleaning power when used.

The American Petroleum Institute shares the quality of engine oils in two categories:

1. رEngine motors for gasoline vehicles with the first letter of service station (S) that display the quality level in English letters A (lowest quality level) to N (highest quality level)
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2. Engine oil for diesel cars with the letter “Commercial” (C), which shows the quality level in English letters A (lowest quality level) to J (highest quality level).