Fuel types

Asked by Oct 29, 2015 at 10:12 PM about the 2004 Subaru Impreza 2.5 TS Wagon

Question type: General

If I have half a tank of ulp91 in my
Car can I top it up with ulp95? Or do I have
to wait for my car to completely run out of
fuel?

2 Answers

107,485

If this is a octane rating your inquiring about then no you don't have to wait, it should mix fine, if your concerned about it you could just add some booster to the fuel. HTH

6,540

You'll end up near 93. When my MR2 used to run on 90 I'd just mix 87 and 93 to get 91 (it's not quite linear) for cheaper than 89 "mid" grade. Don't worry about it. And why do you want 95? Are you running a chipped turbo or water injection?

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