My MPG Dropped Significantly When I Changed To Fresh Oil!!!
At 120,000 miles on the Delvac 1 oil of my 2006 Volvo 780 (w/ Volvo D12 engine) and about 650,000 total miles on the engine, oil analysis suggested I finally change the oil, so I did. I discovered my MPG on flat land w/ MT trailer dropped from around 9.0 MPG to around 8.0 MPG!!! :(:(:(
The good news, is that after a few thousand miles, my MPG is back up to where it should be. :smokin::smokin::smokin: http://thesouthwindmotel.com/images/..._rv6d_bkmt.gif |
mine did the same.. i'm wondering if its the winter blend fuel?
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Have you had oil sample done? All I can think of is the fresh oil was thicker, as maybe the old stuff lost viscosity possibly due to fuel oil dilution. Hope not for your wallet's sake.
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I'm still trying to digest the fact that a truck driver can spell
[h=2]Significantly[/h] |
Spell Check is a wonderful tool.
I'm thinking with YerDaddy, sounds like a heavier weight oil went back in than what was spec'ed. I know my personal vehicle got crappy mileage when I ran 10W until it got about 4,000 miles in on normal everyday driving to and from work. After that the mileage jumped up about 3 mpg. Of course on long distance trips 10W actually got better mileage than the 5W got. |
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I tend to believe, oil has nothing to do with it. Or at least didn't played a major role. In any case it takes more than a small viscosity difference to loose a whole 1mpg! Probably combination of factors, but since it's back to normal, i wouldn't pay much attention to it....
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