Diablosport Forums

part # 7146
v.9r07
03 ford mustang

Would I have any problems if I used 91 oct with the 93 oct tune?

Hi chris098,
Yes you would have problems if you did that!( Detenation) I suggest you decrease your timing by 1* to 2* degrees which will put you around the 91 Octane level. You accomplish this in the global Spark settings , and listen for pinging or engine knock! Don't use Octane booster's either, they don't work!!!!!
Albert Mac

Always run what octane that is required for the tune so you don't run into any issues. If you can't get the correct octane fuel you can always make timing adjustments to compensate for this.