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horrible mpg

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Old 02-19-2013, 07:19 AM   #1
feldman28 [OP] feldman28 is offline
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horrible mpg

So the last month and a half I been getting 10.5 to 13 mpg. These is no cell on. I run 93Oct. IM only getting about 180 200to a tank. There is no had leak. Maybe thermostat is . It's killing me I do I've 350 Miles a week to work. only thing done to truck are fox shocks and 3 in lift. And drop in filter. Keep it under 2000RPMs and under 60. I know it's winter but come on. I let it run 5 min to warm up. Any one have a clue what it could be. I was getting 15 18 mpg before truck started to hate the world. Just hope it's bad has.
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Old 02-19-2013, 07:21 AM   #2
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can i ask why you are running 93 octane? are you S/C? If you arent boosted or its recommended to run it dont you dont need to. there is no benefit to running 93 if your truck will run off 85 or 87.
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Old 02-19-2013, 07:48 AM   #3
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If I run 87 I get 9.1 9.5 mpg. Plugs are good filter is clean
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Old 02-19-2013, 04:49 PM   #4
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Octane isn't an energy rating. Higher octane fuel just handles compression better, that is why it is required in boosted and high compression engines. There is a chance that your higher octane is ethanol free though in which case that explains the better fuel economy.

Every mod I do, I lose fuel economy... The lift hurts your aerodynamics, tires hurt your aerodynamics and your rotating weight, etc... It adds up... I was getting about 16-17 mpg in the summer and am getting about 11-13mpg now in the winter... All on the cheap octane. Our vehicles must really dislike the winter blend is all I can figure...
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Old 02-20-2013, 07:27 AM   #5
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dont warm up so long. when your truck is sitting at idle its basicaly getting 0 mpg.
Have you calculated the tire size difference and adjusted your actual miles traveld to get a truer MPG reading?

Cleaned your throttle body lately?

tire size calculator
tire calculator
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