what to do if i put the wrong gas in my car

Asked by Nov 23, 2015 at 02:05 PM about the 2008 BMW 3 Series 328i

Question type: Maintenance & Repair

wrong grade of gas put in, car is running bad, is it coincidence or gas is
affecting it.  What do i need to do?

6 Answers

33,995

I would live with the problem until it is down to a half tank and then top it off with premium. If you are worried about it add some octane booster like this ----

3 out of 3 people think this is helpful.
209,855

If it still continues to not run correctly after you try the above, you might have another issue. How many miles on the car? Any lights lit up on the dash?

1 out of 1 people think this is helpful.
19,225

what gas did you put into in by mistake and what is the recomended grade/ octane....and does it rattle only under a load????

31,395

Grade of gas is not likely to make a noticeable difference unless you put your foot deep into the gas pedal. I would think you likely have other issues.

1 out of 1 people think this is helpful.
19,625

Yeah, a lower octane gas is not gonna cause immediate problems- how long since you had a major service on that Bimmobile?

1 out of 1 people think this is helpful.
1,025

You likely won't have an instant problem because of the gas being too low octane, but you should probably just add in premium gas. Octane booster wouldn't hurt, either. Heck, you could probably throw in a bottle of fuel treatment/cleaner, too, because depending on how long it's been since your last treatment, that could be an issue here.

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