Hi guys,
just purchased a new T-680 , wondering when we will see the best fuel mileage? People are telling me there is a break in period and that after that the fuel economy will be good.
Thanks
T-680 break in period
Discussion in 'Kenworth Forum' started by jameson1985, Mar 5, 2015.
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From what I understand is, you can expect the fuel economy to improve over a 60,000 mile period. I THINK you might expect about .5 mpg improvement over that period.
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Thats Exactly what ive heard as well ...i wonder why that would be ... ?
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After 1st valve set at 40000 miles power and fuel milage went up 4/10ths and by 75 to 80,000 it was up about 7/10ths then winter hit
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Internal resistance of the engine decreases as parts wear in together. Valves as mentioned above, and tires rolling resistance decreases as tire treads smooth out.
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Depends on how you run it, too.
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