04-07-2009, 09:25 AM
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#11
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Registered Member
Join Date: Apr 2008
Posts: 1,264
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Same trip today weather conditions were 50 degrees clear and low humidity.
38.5 miles, 74.7 MPG.
Compare that to yesterdays trip with significantly lower mileage due to heavy rain.
Inbound the first half of the trip was 78.9 MPG, starting from a warm engine.
After an hour of sitting the return trip mileage dropped to 75.4 MPG, then the rest of the trip resulted in the recorded mileage of 74.7 for the total distance travelled. The return trip was into the wind and an elevation change of + 70 feet. The first half was with the wind and a -70 foot elevation change.
The largest factor in the difference in mileage in the two trips was due to weather conditions and standing water on the road due to rain yesterday.
As previously stated the mileage difference due to weather was 10 MPG. Actually is was closer to 13 MPG.
All other factors being identical, the comparison between MPG losses due to cold starts and weather provide a good comparison.
13 MPG difference due to lousy weather.
Difference due to cold starts as stated previously.
regards
gary
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