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03 Mileage Drop, Help?

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Old Dec 26, 2008 | 10:32 PM
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bruceshibley
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03 Mileage Drop, Help?

The other night my truck digital readout that had read 13.5mpg for the longest time went down to 11.2 and has gone up to 11.5 but not higher. I recently changed fuel filters, oil fliter, ball joints and wheel bearings(and although not that it would affect mileage poly bushed the whole truck, ugh). I thought it might have been the station i fueled up at and we had a lot of rain that week, but have since ran diesel from a station that I use a lot and nothing changed. Any ideas? Worried the PCM might be faulty. Any way I can check that without subjecting myself to a dealership visit? Any help is greatly appreciated...
 
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Old Dec 26, 2008 | 11:33 PM
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From: Kansas City/Breckenridge
You need to figure out what your actual mileage is by hand calculating it

the lie-o-meter is far from accurate.
 
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Old Dec 27, 2008 | 11:19 AM
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winter blend of diesel fuel will cost you 1.5-2 mpg usually.are you in the great white north
 
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Old Dec 27, 2008 | 12:15 PM
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The iwinter blend thought came up. It was really such a drastic drop. I live in Southern California. I am sure they do not make LA specific fuel, they do make california blend becuase we do have areas that get the winter weather. So I will attribute it to that for now. thanks!
 
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