I've been having to use diesel all the time now- short trips every day prevent the car from warming up fully (it was cold here today- low 25, high 40). Over the summer, targeting one fillup period in particular, I burnt 15 gallons of veg and 15 gallons of diesel. Got combined mileage of 38. During the summer that was OK, since the fuel was free. Now it's starting to add up.

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Andrew

1989 Volvo 745- 202K