Originally Posted by JimC
Actually higher octane has a slower burn and combustion to avoid detonation
It was my understanding that 93 octane fuel is more dense. Yet it combusts easier so the engine is doing less work with what it has, yielding the mpg gains.
High compression engines use it I suspect because it can hold more before combusting. I know these two statements are either correct or far from, so teach one about gasoline.
Also, my lag did go away some and it had less issues engine wise. I pay extreme attention to my car. It did benefit but until I'm tuned, I'll leave it at 87.
---------- Post added at 02:21 PM ---------- Previous post was at 02:20 PM ----------
Originally Posted by RocknCali
What about a v6 with no tune and a no tune CAI?
9 more horsepower and a cleaner engine internals wise. That's about all I got out of it and 5 more mpg around town.