So is 91 octane really that good for an automatic v8?

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07-08-2009, 01:53 PM

#11

ski

4th Gear Member

Join Date: Mar 2006

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Posts: 1,470

Quote:

Originally Posted by maloce

I think I forgot to mention it but I have a 2010 premium automatic. The manual says it benefits more from 91 octane or more.(I can only seem to find places selling 87,89, and 93 here in Texas).

I read some reviews saying it will increase my torque, but will I really notice a difference if I slam the pedal down on the highway or at a stoplight?

I've read that an additional 10 lb-ft of torque is produced between 1000-3000 rpm when switching from 87 octane to 93 octane. You should be able to feel that difference, even when reduced to approx. 8 lb-ft at the rear wheels.

07-09-2009, 10:40 PM

#12

Bolt

1st Gear Member

Join Date: Jul 2009

Location: Texas

Posts: 124

i have a couple friends with 2005+ gts (2006 and 2008). they had a bit of a debate over this. one noticed 1 or 2 mpg gain and the other was the exact same.