Thread: How bout those gas prices?
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Zoolook
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Old 03-23-2012, 11:57 AM
Quote:
Originally Posted by XJ-linux View Post
Use what you like, I really don't care. I'd guess your car runs just fine on 87. The engine de-tunes to accommodate the swill, running less efficiently and producing less power and worse gas mileage. It's a win-win choice for you.
It does, although the ignition timing adjusts according to load and fuel octane automatically, so under serious load (especially at low RPMs) I might lose 5 or 6 hp or 1 or 2mpg, but while cruising it makes no difference, at least in a new engine.

I have a very long road trip next week, so am going to test the MPG 87 Vs 91, I'll let you know - I'm pretty curious myself.

I still think the 'swill' comment is funny... it panders to the marketing. The difference between 87 and 93 octane has nothing to do with the purity of the gasoline or it's quality, simply the trimethylpentane and heptane mix. Most people who yack on about octane ratings don't even know what they are.
In the land of the blind, the one-eyed man is stoned to death.
- Joan D. Vinge
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