Oil changes

[HDWILLIES]

I'm just curious how often you guy's change your oil? I have a 99 7.3 with
around 85,000 miles on it. I bought it used so I didn't get a owner's manual
with the truck. if anyone has a manual for my truck they would sell, let me
know...HDWILLIES@aol.com

[bigcountrysg]

Originally Posted by HDWILLIES

I'm just curious how often you guy's change your oil? I have a 99 7.3 with
around 85,000 miles on it. I bought it used so I didn't get a owner's manual
with the truck. if anyone has a manual for my truck they would sell, let me
know...HDWILLIES@aol.com

Every 5,000 miles with Rotella 15w40 and a Fram Oil Filter. As for your manual I got one from the local parts store about 15 bucks it is a great investment.

[MidwestOffroad]

Just bought mine and the manual says 3000 miles. and previous owner had it in for a change at every 3k

I am going to run Amsoil diesel and marine 15w40 and there filter and run 7500 on a change I may do a fiter at half way that.

may do the bypass filter from Amsoil also or fs2500
check ebay for a owners manual . most manuals are the same , thre is just a supplement for the diesel section. they will be complete in a zippered case. usually can pick one up for 10 bucks or so.

Deffinatley pick up a chilton or hanyes manual for it to on repairs

[99 7.3]

same as bigcountrysg, but i change mine every 3000 to 3500.

[bigcountrysg]

The chiltons manual i think is the better one between haynes and chiltons for our trucks. I have a chiltons and a haynes the chiltons is more detailed and has more info for the powerstrokes then the haynes.

[MidwestOffroad]

^^^ agreed I bought them both .never have to much info.

[Lord Tauk]

I was doing 3,000ish changes with regular ol' Rotella 15W-40 for the first two oil changes I did with the PSD, but 2 weeks ago I switched to Amsoils 5W-40 and plan on going to 5000 then getting another oil test done to see where I stand.

[Rescuediver]

Originally Posted by bigcountrysg

Every 5,000 miles with Rotella 15w40 and a Fram Oil Filter.

That's exactly what I do!!!

[RopinandRidin]

I know that this makes the "play it by the rules" people cringe but my 350 went over 650,000 miles having the oil changed no sooner than every 6-7,000 miles. Most of the time, it was between 7-10,000 with plain old Shell Rotella 15-40. That engine today still looks good enough to be under a new engine 100K warranty.

The 250 gets it changed about every 5,000 but it's my wife's and she's one of the "rules" followers.