My fiesta is stock besides the RMM. I purchased a COBB accessport and want to put map the 93 octane tune today. The only issue?? I currently have 87 octane gas in the tank! (about ? full). So?a few questions.
1. Is it ?safe? to run 87 octane fuel on a 93 octane tune?
2. Should I fill up the remainder of the tank with 93 octane and run the 93 octane tune?
3. Or, should I fill up the remainder of the tank with 93 octane and run the 91 octane tune?
4. Should I just wait patiently for an empty tank to remap?
I know I should probably be patient, but I am still curious what the consequences are if you run lower octane fuel on a higher octane tune.
Thanks all.
Matt
1. Is it ?safe? to run 87 octane fuel on a 93 octane tune?
2. Should I fill up the remainder of the tank with 93 octane and run the 93 octane tune?
3. Or, should I fill up the remainder of the tank with 93 octane and run the 91 octane tune?
4. Should I just wait patiently for an empty tank to remap?
I know I should probably be patient, but I am still curious what the consequences are if you run lower octane fuel on a higher octane tune.
Thanks all.
Matt