No - You're not understanding what I meant. Your truck was designed to run on 87 octane gas. It should do that just fine as long as there's no underlying problem. Fixing it by burning 93 octane gas is like putting a bandaid on an oozing sore - the infection's still there, but you don't see it.
Why did you get a power loss at WOT? Just a guess, but perhaps you hit the rev limiter - which causes an immediate "cut out" to prevent damage. Why don't you get this using 93 octane? You might, if you advance the spark to take advantage of the anti-knock properties of the fuel. Right now, your spark is retarded for the fuel you are using and you probably develop LESS power at a given throttle setting/load than you did using the 87 octane gas. This means the truck will not pull as "hard" as it did with 87 octane, since the "burn" is not coming at an "optimum" time in the piston's power stroke.
- Jack
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Tue, August 31st, 2010, 03:49 PM
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