I had to read it like 10 times before I got what you were trying to say.

I have the 91octane tune and use 93octane because it's winter and moisture is a problem.
Which ever tune you use, you must match or exceed the gas requirements. if you choose the 91oct tune, you must use atleast 91oct or better. If you use the 93oct tune, you need to fill up with 93oct.

I stated that the 91oct was the best overall tune for perf and MPG gains. If your looking for straight up perf and care less about mpg's or $$ go with the 93oct tune. This is all on the Diablo Predator for those that aren't sure.

 

sorry about the confusion. what about 87 or 89 tune? being a college student i cant afford premium gas. are there still performance and mpg gains with those tunes?

 

I've had to use the 87 tune when I can't find better octane and it seems to get a little better mileage than stock (sh** weather so I can't really tell). Really impressed with the 91 tune...

 

do you have the diablo predator?

 

Ok, running the 093 octane tune, I went from 16.3 avg on my daily commute to 17.9mpg. It would have been better, but I get off an hour later on Fridays and traffic was much worse than usual. It will be better next week when I have less traffic to fight.

Oh, my Predator only has 87/91/93 octane canned tunes. No 89 octane. And yes it has the latest revision.