mixing different octane gas...good or bad?
02-24-2002, 01:49 PM
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mixing different octane gas...good or bad?
i've gotten into the habit of putting 89 octane gas in two fillups, then on the third fillup i use 93 octane. i'm a cheap bastard and prolly not doin any good for my car, but is there any real harm in this? gas in my area has been as high as $2.80 at one point, now it's around $1.35 a gallon. let me know. thanks.
02-25-2002, 02:19 PM
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Re: mixing different octane gas...good or bad? (el_Presidente)
Your octane rating is additive and proportional to percentage of each type of fuel.
E.g., 5gal of 89 + 5gal of 93 = 10 gal of 91.
Running two loads of cheap to every one of good does nothing.
E.g., 5gal of 89 + 5gal of 93 = 10 gal of 91.
Running two loads of cheap to every one of good does nothing.
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