[Donger]

Originally Posted by Detoxing

Right, but it's a 2-day study. You can't possibly reach any conclusions regarding the longevity of the components in the car to see what kind of affect the fuels may have. As Radar noted, running 91 in a 87 octane car prematurely ****ed out his Cat.

And my concern really isn't about 87 Octane cars running on 91, but rather 91 octane tuned cars running on 87.

So really, the article didn't do much to answer the question other than to let us know that 91 Octane doesn't really boost performance in an 87 octane car.....but that should be a bit of common sense. I found that out with my Firebird back when i was 19.

I'm not familiar with any potential damage that running 87 in a motor that "requires" 91 will cause. For me, it's a question of am I willing to spend another $0.30/gallon to not lose 20% performance reduction? My answer is yes.