My T680 is running at 7.4 mpg currently. I set my cruise at 62 loaded or empty. In three months doing this, I have upped the fuel mileage from 6.5 to 7.4.
It is a 2014 with 350k miles on it. It has been in the shop once when the engine fan clutch went out.
Something I have noticed about the KWs (680 and 700) is they seem to go through a lot of DEF. I always have to put in at least a quarter tank at every fuel stop, sometimes more. Anybody know if this is normal?
On the 2014 t680's it might be the DEF doser injector or there might be a leak. Next 10, look under and around the DEF tank and lines for dried up white and/or crystaly residue. Hope this helps
Posted: 7 years, 11 months ago
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2016\2017 Freightliner vs Kenworth MPG average, please help
On the 2014 t680's it might be the DEF doser injector or there might be a leak. Next 10, look under and around the DEF tank and lines for dried up white and/or crystaly residue. Hope this helps