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It isn't soot, more like small oil droplets. To be honest, I can't tell much difference in the way the 929 runs. It ran well before the treatment. My freightliner is the one that is running like crap. I've added the above (less Seafoam) to both tanks, but unfortunately they are tied together and...

I put a gallon of ATF, a gallon of high mileage 5-20w oil, and a gallon of Lucas fuel treatment in the drivers tank which had about 1/4 tank of fuel and ran it. Is it normal for junk to come out of the exhaust when doing this because the truck has little specks of something all over it now...

Wow! I must do this.

Once I broke the valve free, which didn't take an excessive amount of force, it works good now. I will be alternating tanks on a regular basis as well. The fuel filter on the Freightliner is kind of odd. It sits on top of the engine in a housing with a removable lid. It would be the perfect /...

Awesome information! Thank you for taking the time to share. Very informative.

So, to be clear, do I do this all at once, oil, Seafoam, and 2.5 quart Power Service all on 1/4 tank? I have a Freightliner flatbed delivery truck that is running like crap, it needs it too.

I drove it about 25 miles after switching the tanks.

Back to the topic. I used a crescent wrench today and broke the valve loose. It operates smoothly now, and I swapped tanks with no issue. I think I'm going to need a sending unit in the driver's tank, it's very unstable. Gauge moves wildly back and forth when the vehicle is moving. Where is the...

Good enough. Peace, my friend.

Good grief. This is my fourth MV, my third 5 ton. My last truck was a MK23. I've owned these trucks in various configurations since the early 90's. While I certainly don't claim to have an exhaustive knowledge of these vehicles, I know how to drive these trucks, service these trucks, understand...

Uh, no. I'd rather dig a ditch. :ROFLMAO: But I agree, I should.

Thank you!!!

There is some kind of floor covering in this truck. I'll get a crescent wrench and see if I can move the handle. Thanks!

What's the valve between the driver's door and seat near the rear of the cab for? I tried turning it, but it appears to be stuck. I haven't traced the lines out yet. Is it the valve that switches the fuel tanks perhaps? Also, does the dump bed latch close automatically when the bed is lowered...