Car requires 91 fuel but there's only 87, 89, and 93

Asked by Perrin Mar 11, 2018 at 01:13 PM about the 2002 BMW 3 Series 325xi Sedan AWD

Question type: General

I just bought a 2002 BMW 325xi and on the gas
door and in the manual, it says only to use 91 fuel.
In the area i live, there is only 87, 89, and 93.
Should I mix 89 and 93 to get 91 or is it not that
simple? Will it cause any damage to the engine to
put in the wrong fuel type?

2 Answers
103,435

KenF answered 6 years ago

Just use the 93. https://www.bimmerforums.com/forum/showthread.php?1316371-is-91-octane-gas-a-must

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F_O_R answered 6 years ago

93 is good but yes you can mix grades to get a custom octane.

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