GMC Typhoon was created in 1992.
A stock GMC Typhoon is governed by the ECU and will not exceed 124 MPH.
65% of 87 and 35% 93 to make 89 octane gas
93 octane is the first choice, but 87 is fine, if you can't find 93 octane. optimum performance is achieve by 93 octane.
GMC
if it is stock compression 93 is fine..where did you find 98 octane anyway?
The 5.7L Hemi will run the same on 87 or 93 octane.
regular 87 octane.
93 octane works best.
your car must have 93 octane.
93 octane
not exeeding than 130mph