I'm almost out of 87 gas and i'm looking forward to the 91 tune... should i run down the 87 tank as much as possible and fill w/ 91 then while at the pump put in the 91 tune?
OR....
should i let it run a bit w/ the 91 in the tank then do the tune?
I don't mind wasting a few bucks on unnecessary octane but i do not want any pinging.
thanks in advance for you input
OR....
should i let it run a bit w/ the 91 in the tank then do the tune?
I don't mind wasting a few bucks on unnecessary octane but i do not want any pinging.
thanks in advance for you input