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Old 06-11-2013, 10:56 AM
Hermes1 Hermes1 is offline
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Quote:
Originally Posted by huntergreen View Post
do you see a difference between the two?
I am curious as well. My last vehicle specified 87 octane, except when towing or carrying heavy loads where it specified 91 octane. Under normal driving conditions it performed well with 87, but the one time I towed with 87 it was sluggish. With 91 it performed better.
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