Hi

1995 F250 7.3 with 350,000 miles. I have an oil consumption problem that I can't seem to get a handle on. There are no leaks. and no really noticeable smoke. The truck makes pretty much the same highway trip to the same place with the same load yet it can use varying amounts of oil. The last trip I made is about 200 miles and used a gallon of Rotella 15w-40 and used 11 gallons of fuel. The same trip 2 weeks ago used a couple quarts. Based on reading the forums I was convinced it was going to be injector o-rings but the fuel filter looked pretty normal and most certainly not black. Based on videos I watched the blowby does not seem excessive.

The reason I was convinced it was injector o-rings is there isn't any noticeable smoke coming out of the pipes. I followed behind it with a friend driving it and at highway speeds there isn't enough that I can easily see it. I had him stomp on the gas a few times and there was a tiny bit of oil smoke but that was about all there was.

My questions are could the injector o-rings still be leaking even though the fuel filter isn't black. And would I even see smoke if it was burning a gallons worth of oil in 200 miles. I'm assuming I would but I realized I really have no idea if that kind of usage coming up through the rings or through the turbo would even show up.

Thanks for any insight you can give me on this.
Derek

 

Yes it can considering you are adding oil, so you are not letting the oil get black.
Bad injector O rings both internal and external can make the truck use oil.
you are better off sending them in to get rebuild and maybe making them bigger

 

Thanks for the response. It was my understanding that bad injector o-rings makes the fuel filter black and that is what you check. Did I interpret that incorrectly?

 

If your oil is clear so will your fuel filter.
and you are adding oil every 200 miles give or take I bet your oil is clear on the dip stick.

 

Thanks for the info.

Pic of my daily since you have a z31

 

Beautiful 240 man. My Z hasn't seen action since 08 or 09 its been sitting, one day it's going back on the street.

 

That is sweet. I have had a 280 and a 300 zx turbo 50th anniversary edition .

 

Thanks. If I didn't own this one before the jump I couldn't afford on now. They are stupid expensive.

 

Yes they are, I have been looking but dang.

 

Could be the internal oring inside the injector or the intensifier piston. This is most common on our DT466/DT530 HEUI customers.