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Old 04-15-2020, 07:39 AM   #26 (permalink)
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Gaptooth (retired) - '00 Honda Insight
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Originally Posted by GreenTDI View Post
The best mileage so far, for a long distance (150 miles) was 71 MPG
The second best mileage I achieved for a very long distance (400 miles) was 68 MPG. Those MPG's are real MPG's, measured at the fuel pump.

Both distances were traveled at speeds between 55 and 60 MPH at 1750 - 1900 RPM in 5th gear. The car is not yet modified.

I recon that lower speeds will increase the mileage a little. However, the highest gear is quite long for the tiny three cilinder diesel engine, and lower speeds will make the engine hum with greater load.

The very very best mileage could probably be achieved in 4th gear at 35 - 40 MPH? Less drag at those speeds.
US or UK gallons? Care to start a fuel log? Which vehicle exactly?

Wish we had 3 cylinder diesels here.
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