Aug 5, 2015, 12:02 PM
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How to Improve Gas Mileage in 5.7l HEMI?
Registered User
Joined: Dec 2019
Posts: 1
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2015 Dodge Durango heme 5.7l
Okay I have finally figured out how to drive my car and get good gas mileage (76 years in the learning zone !!).... it's really very simple you drive a car as though you were in a spaceship in outer space ...you hit the gas ...gain momentum.... back off... feather the pedal... last tank of gas I got 21.2 miles per gallon with my 2015 Dodge Durango hemi engine 5.7 l.... that's an around the town record !!! .. I wonder if 76 is too old to apply to be an astronaut...?
Registered User
Joined: Feb 2023
Posts: 1
Likes: 0
Here's hoping that someone will have some advice.
I have scanned several sites and lots of Dodge forums regarding fuel mileage on my 2005 Dodge Ram STI Quad Cab 5.7L Hemi. I replaced the platinum plugs that the previous owner installed with Champion Copper Plus, I changed the air filter (stock), pulled the throttle body and cleaned off the caked on carbon and wiped out what I could reach of the intake. I stopped using 87 octane fuel and filled up with 91 at half a tank. I am into my second half tank of 91 (cheaper at Sams Club than 89 at most other stations). My mileage is still 9-10 city and about 12-13 highway. Several things I have noticed. When I start the truck and immediately put it in gear the trans slips (hot or cold doesn’t matter). If I wait 30 seconds then put it in gear all seems ok. No other slippage noticed. After that 30 second wait time I put in gear and drive say 20 feet (end of my driveway) the truck stumbles and sometimes stalls, usually only cold but occasionally hot.
Anyone have any constructive thoughts?
I have scanned several sites and lots of Dodge forums regarding fuel mileage on my 2005 Dodge Ram STI Quad Cab 5.7L Hemi. I replaced the platinum plugs that the previous owner installed with Champion Copper Plus, I changed the air filter (stock), pulled the throttle body and cleaned off the caked on carbon and wiped out what I could reach of the intake. I stopped using 87 octane fuel and filled up with 91 at half a tank. I am into my second half tank of 91 (cheaper at Sams Club than 89 at most other stations). My mileage is still 9-10 city and about 12-13 highway. Several things I have noticed. When I start the truck and immediately put it in gear the trans slips (hot or cold doesn’t matter). If I wait 30 seconds then put it in gear all seems ok. No other slippage noticed. After that 30 second wait time I put in gear and drive say 20 feet (end of my driveway) the truck stumbles and sometimes stalls, usually only cold but occasionally hot.
Anyone have any constructive thoughts?