Originally Posted by skyshock21
Okay, LOTS of misinformation in this thread!
Here's the deal - ALL gas burns equally cleanly - just at different compression ratios. Octane ratings are used to determine at what compression the gas burns completely.
(I might have this next part backwards, I'm sure someone will correct me)
Higher octane fuels will burn completely at higher compression ratios, while lower octane fuels will burn completely at lower compression ratios. Again, I might have that backwards, but that's generally how it works.
If your gas doesn't burn completely, it'll collect in your catalytic converter. If it burns too quickly, it'll make your engine knock.
Basically check your owner's manual to see what the compression ratio of your engine's cylinders are (and which gas they recommend), and don't listen to BS from fairweather mechanics - or (ironically) BS on Internet message boards.
Very nice ANSWER. You would be the only one that wasnt a dick enoug to do so. I was going to answer but you summed it up. If one of you told me that I should use ant less than 93 octaine in my car, i'd laugh in your faces. maybe your dx's need 87, thats why you think it's not worth the money for 93, (cus you cant use it.) The real argument question would be if Mobile and Exxon's gas is better than everyone else's or not....