87 Octane or 91??
#3
RE: 87 Octane or 91??
Nope. but the factory Tune is set up to run 87 octane (burns faster than 91) with the stock air intake and filter. If you run on 91 you may get slightly better HP or mileage but it also, depending on the individual car, might cause the opposite. Mostly you will be wasting money. If you want the benefit of higher octane performance and fuel economy you must re-tune your mustang to run with the exact combo of air intake/ tune and higher fuel octane. To get a better tune do the time and research on this forum the FAQ section on tuners and tunes...you wont be sorry.
Most of the time reatilers "91" octane is slghtly diluted or not even actual 91 octane but just a mix or only 87. You wont be able to tell from the pump. drive a tankfull to see if you notice anything.
Most of the time reatilers "91" octane is slghtly diluted or not even actual 91 octane but just a mix or only 87. You wont be able to tell from the pump. drive a tankfull to see if you notice anything.
#5
RE: 87 Octane or 91??
Ive been running 91 Octane tune from Brenspeed for months. Love it. and no problems. Even been able to push timing a little 0-2000 at +2. No detonation on the xcal capture charts.
#6
RE: 87 Octane or 91??
ORIGINAL: TUGGER
I have the SCT Xcal tuner and have both 87 and 91 tunes I can use. I just was wondering if the manaul was saying I should only use 87.
Thanks
I have the SCT Xcal tuner and have both 87 and 91 tunes I can use. I just was wondering if the manaul was saying I should only use 87.
Thanks
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