Hey guys,

I am going to get my B20 swap tuned soon and was wondering if I can get some input from you.

Should I have the car tuned on regular gas (octane 87 or something like that) or should I tune it for Premium for more power (91 octane)?

Am I going to see a significant difference in power and torque between the two fuels?

This is my DD, I don't mind spending the extra 20 cents per gallon, but I am wondering if it is worth it.

 

Don't know why we aren't asking our tuner this question.

 

Beyond the obvious that grumble has already posted, you also seem to know nothing about fuel. Higher octane = higher detonation resistance. You won't magically get more power from higher octane, but it will give your tuner more leeway in how hard it can be pushed. Also, whatever octane you get tuned on is the octane you need to stay with, period. On top of that, you failed to tell us what modifications you have.