Horrendous fuel milage (in my opinion) 2012 1500 SXT QC 5.7L 4x4
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Registered User
Joined: Feb 2013
Posts: 12
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From: Saskatchewan, Canada
Unless ther`s something bad wrong with your truck, sounds like driving habits may be your issue. Check your tire pressure, colder days you`ll lose pressure, this will cause the truck to drag and make the engine work harder. And if you`re running an aggressive treaded tire, they`ll rob you of mpg. How long are your first start-up`s... to let the truck warm up. That will suck your mpg`s away as well. Also concider winter blended fuels... that will suck your mpg`s away. Cold temp`s use more fuel. You`ve got a lot to concider during this time of year... ESPECIALLY living in CANADA...!!!
With the app I have I input the odometer reading, the amount of fuel used, and the cost of the fuel. It's accurate.
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Joined: Aug 2012
Posts: 55
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From: Elkhorn, NE
i get about 10.9-11 on regular i know alot of people out there say going to midgrade or premium doesn't affect mileage but the first time i filled with mid grade my mpg went to 11.5-11.8 and i know i haven't changed my driving habits
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Joined: Apr 2010
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From: MN
Rob
Record Breaker
Joined: Apr 2010
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From: MN
"The manufacturer recommends the use of 89 octane for optimum performance."
This statement in the manual is a reference to the fact that, while the Hemi will run safely on 87 octane, it is tuned for 89 and the engine will retard timing to safely burn the 87. You will get lower gas mileage due to that if you run 87. Maybe saying that the Hemi 'requires' 89 is too rigid, but that is the normal octane the engine is designed for.
Rob
This statement in the manual is a reference to the fact that, while the Hemi will run safely on 87 octane, it is tuned for 89 and the engine will retard timing to safely burn the 87. You will get lower gas mileage due to that if you run 87. Maybe saying that the Hemi 'requires' 89 is too rigid, but that is the normal octane the engine is designed for.
Rob
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Joined: Jan 2010
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From: San Pedro, California
I sense another gas war starting up.
I haven't noticed any difference between 87 and 89, if anything I get better milage with 87. The only time 89 will help you is when you need the extra power (WOT), the rest of the time the hemi doesn't care. Hell, in higher altitudes 89 is just a waste.
I haven't noticed any difference between 87 and 89, if anything I get better milage with 87. The only time 89 will help you is when you need the extra power (WOT), the rest of the time the hemi doesn't care. Hell, in higher altitudes 89 is just a waste.
Record Breaker
Joined: Apr 2010
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From: MN
No 'gas war'. I was just trying to help Nick with an explanation of why his MPG might have gone up when moving from 87 to 89. If something else works for you or others, great. Do what works best. This is the Internet... we're all wrong.
Record Breaker
Joined: Jan 2010
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From: San Pedro, California
Temperature, air pressure, air density, elevation, gas quality, driving style, worn engine, carbonated valves, head winds, tail winds, tires, synthetic oil vs regular oil, etc, will affect gas milage, so comparing the diff between 87 and 89 is not easy. The energy content for a gallon of 87 and 89 are the same.
Captain
Joined: Apr 2007
Posts: 566
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From: Western PA
Straight hwy driving, even in the winter, I get a minimum of 16 mpg so the OP getting 10-11 is huge to me. Something does seem out of the ordinary. 4wd Auto engaged all winter? I know that drives my mpg down pretty good.