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My new 2500 was really disappointing me. High average was 17 and the common average was down around 14-15. This is brand new out of the box. I usually run 75mph on the interstate to work and back. I decided to cut it back to 68-70 and see if that made a difference. Not really. I think the big...

My new 2500 was really disappointing me. High average was 17 and the common average was down around 14-15. This is brand new out of the box. I usually run 75mph on the interstate to work and back. I decided to cut it back to 68-70 and see if that made a difference. Not really. I think the big...

Don't ask, don't tell. Didn't get into it with them and it was after hours when I picked it up. They charged DC for a new gasket... . whatever that means. I'm just hoping all this snow will somehow wash all the oil of my drive. ------------------ Chris Ludwig 2001. 5 2500, 4x4, QC, auto...

Complained of an oil leak on my 2001. 5 a while back along with a few others. I was convinced it was not the valve cover or draft tube but was the rear main seal. Well, good thing I ran my hand along the back of the head before I took it in. Anyway, mine was the valve cover and it has been...

DEEZAL-MAN, Navistar does put every PSD on a test stand before it's installed and every Super Duty is chassis dynoed before it goes out the door. I'd be willing to bet that DC have very similar practices. RONSRAM, typical parasitic drivline losses usually approach 20%. Especiially on...