Powerstroke Oil Info

Turning black is pretty normal. I wouldn't bother changing oil that often; it is a waste of money and the engine will outlive the truck at factory intervals.

The major difference between Diesel oil and Regular motor oil is that Diesel oil is formulated to hold soot in suspension, this avoid black mud in the crankcase.

Soot is black.

If your oil doesn't look like ink after 500 mile; Something is wrong!

1) Your soot is not going into suspension, wrong oil?

2) Your pulling the wrong dip stick ;-)

Navistar designed this engine to run 5,000 mile between changes, and they warrantee that it will. Just about every ambulance built in the last 10 years has this engine, you only think you drive as hard as they do. Blown engines are almost unknown.

Want to change oil every 2,000 miles? Go ahead. Do you also drop ATF every 5000? If you think about, why use all the fuel in your tank, maybe it would be wise to throw away 1/2 of that also......

Regards,

Peter Arnold

1987 300SDL 210Kmi 1995 F250 P.S.D. 146 Kmi 2001 P.T. Cruizer {Wife's} 48Kmi, Trouble Free! 1954 Nash Metropolitan {TMU but less than any of the above}

How long is "too long?" You can store diesel fuel for a very long periods of time. It doesn't grow anything unless there is water in it. Then it grows at the interface between the water and the fuel. A small amount of Biobor or similar will eliminate the problem.

Sure, you know better than f**d or any other manufacturer does, so you buy the jiffy-lube argument. These engines are designed to last longer than the trucks they are put in, 3k oil changes or less for something that isn't receiving severe service aren't recommended by anyone except the people selling oil.

My 1986 6.9 diesel had the oil changed every 5,000 to 7,000 miles with Delo

400 and was used almost exclusively for towing a 35' travel trailer. The engine was still going strong when I got a new truck 2 years ago because of all the accessory parts for the truck continuously failing and becoming harder to find in stock at the parts houses as I travel around North America. I use to change the oil every 15,000 miles in the big trucks and they went 400,000 plus miles between major overhauls.

Tom J

ok. you da man i guess.

Yeah, and the big trucks have 10 GALLONS of oil not 10 quarts. So 4 times as long would be about right. 3000x4=12000.