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#2
01-20-2011, 03:53 AM
Hummer Authority
Join Date: Jan 2008
Location: Gaithersburg, MD
Posts: 1,763
Re: 87 or 93 octane?
I run 93 in my 05 religiously...mostly out of habit...and partly because I figured with my 'Performance' tune (Superchips Cortex), 93 would be 'better.'
Did he mention why he was so adamant about 87?
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