Here's another questions for ya! I have a stage 3 Diablo chip (87 octane towing program and a 93 octane towing program). In the area where I live, very few places offer 93 octane, mostly 91 octane. So I put 91 octane (full tank) and no pinging or engine run-on!

a) Should I get the chip re-programmed for a 91 octane towing package?
b) I probably am not getting the most out of the 93 octane program now but am I better off keeping this (when I do come across 93 octane) and continue running 91 octane until then? In other words, am I getting more performance with 91 octane on a 93 octane program or am I better off running 91 octane on a 91 octane program?
c) am I hurting my vehicle by running 91 octane when the chip is for 93 octane!

Thanks in advance for your reply!

 

The engine has a knock sensor that lets it pull back timing just slightly. You'll be fine with 91 octane. Sometimes in very hot conditions at heavy throttle you may notice slight ping if you run 91 octane.

a. No.
b. You'll get more from 93.
c. No, unless you make a habit of driving a lot under conditions that cause ping. (Pinging can slowly pit the pistons.)

If you get ping with 91, throw in some octane booster. Get the highest booster you can get. Keep in mind when they say it raises octane 5 points they meant 0.5, not 5.0. So a good bottle of octane booster will take it up maybe by 1, which is plenty to get rid of ping at 91.