how to lower glabal spark?

[slvrvader]

U7140 v.9r03 06 mustang V-6 was told to lower global spark till I can get good gas in my car.new user..don't have a clue how to do that any help would be great.thanks.or could I use the 87 oct tune with airaid cai till I run all the gas out?

[Phil]

Pick whatever tune you plan to run in the vehicle. It will come to the heading install tune/modify tune. Pick modify tune then modify parameters. Scroll down to spark advance. You will then see global spark adder. retard the timing 4 degrees for the use of 87 octane fuel. Escape back to install tune. Pick install tune and you are done.