Ford Mustang Forum - View Single Post - What octane are you using in the GT?
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post #20 of (permalink) Old 06-25-2010
draekus
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Quote:
Originally Posted by whiteshelby49 View Post
You could try some 87 octane but with the automatic (that's what I have), I noticed a slight hesitation and power loss at low rpm. Like right off idle and at around 30-35 mph when it is lugging along at 1000 rpm. The intake drone inducer would cackle a bit as the throttle is pressed- slight hesitation and then it would accelerate. The outside temps were pretty high around 95-100 degrees.
Ditto here. The hesitation only happens every now and then at low RPN's. I'm going to try 91 octane next time I fuel up to see if it makes a difference.

2011 Mustang GT 5.0 Premium.
Kona Blue Metallic ext with white Lemans stripes. and Dark Charcoal Leather int. Auto Trans., 19 x 8.5-inch machined face with painted spoke aluminum wheels. Roush Axle-Back Exhaust & CDC Chin Spoiler.
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