I shift normally at less than half the max rpm. The quicker you get into the top gear the better mileage you will get. The diesel engine is a torque motor so no need to max the rpm, just get in a rythm and relax.

I always got 20 town and mid to high twenties highway with my 240s. A bit less in winter or very hot weather when I tended to run the motor when parked. I don't do that anymore with the price of diesel.

It'll use less oil too.

Tom W

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.