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Old 10-26-2012, 12:13 AM   #5
peytonracer4
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Join Date: Jan 2010
Location: Valparaiso, IN
Posts: 6,409
My Ride: '00 328i
Quote:
Originally Posted by Redwards_13 View Post
Okay but isn't that what an octane booster does? Increase the octane? So what's the difference between putting an octane boost in 87 compared to simply just putting in 91 or 93?
the octane booster isn't going to spread to the entire tank evenly first of all. second, you don't even know how much octane you're adding, if any so it's useless.
and while you're spending like $5 on that bottle every fill up you could just be putting in the 91 octane cheaper.
just trust us, running 87 will not save you money. it will only piss off your car.
you'll get worse gas milage which will even it out, or maybe even cost you more money.
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