JoedOH
Well-Known Member
I'll be honest, I haven't computed MPG on 87 yet but the truck is showing worse than 91 at 19.2. It showed 22.6 on 91.I'm so glad I ran across this thread, because I thought I was going crazy! haha I've only filled up with premium (91) twice, both in the last couple weeks. The first time was when I was towing our camper just to see what difference it would make (small thing so more power isn't needed), and I noticed a 1-2mpg drop (~20 down to ~18.5). Second time was this current tank which I filled with premium because I was filling the small engine gas can (getting ready for the snowblower) and decided to just fill everything, truck and can, with the same stuff to make things easier. Now I'm getting much lower mileage (~24 down to ~20) on my work commuting. My driving style doesn't require the extra power and responsiveness some of you guys feel you need, so I'm definitely going back to 87 from here on out. Especially since it's almost a dollar cheaper per gallon ($2.75 vs $1.89) right now.
Just because I use 91 doesn't mean I drive with a lead foot. Haven't gotten below 3/4 tank yet and when I get to 1/2 I'll fill up with 93. At that point I'll figure out MPG on the 87 oct. It's not looking as good as the higher octane.
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