Can someone explain to me what gas is better for each set up.

91 is best for?

And e85 is best for?

Can you get away with less supporting mods using e85?

I keep hearing about e85 and always asked what Octane im using or whats available, like it matters. Which I know it does, I just need more info on this is all.

Knock Retard, Dropping down pulley sizes and headers vs plogs etc.

Sent from my SM-N950U using Tapatalk