The Stovebolt Site Forums The Shop Area General Truck Talk Tractor Oil in a 235?

I've got a pressure-oiled '56 235 in my '53 1/2 Ton. One of the first things I did after purchasing it, was change the oil. I noticed it was REALLY thick, and thought it might have been awhile since the last change.

I checked the archives on TSP and sounded like straight 30 weight was the oil of choice. Well, since the oil change (back in June), the engine has been using at least a quart every 1-2 tankfuls of gas. There's an oily film on the tailgate, rear bumper and license plate. The plate that came on the truck was clean, which leads me to think that the thicker oil was minimizing (eliminating?) any blow-by. The truck also wasn't driven much by it's previous owner, so maybe all the miles I've been logging just sorta "loosened things up" ?

I am planning an engine rebuild, but not sure when that will happen. Seems like I read somewhere that some bolters run tractor oil. If so, what viscosity is it, and is there any side-effect from using it? I'm okay with the engine using oil, but the problem seems to have started only after I started using 30 weight.

Any insight is greatly appreciated.

-murph

Sometimes the old motor will loosen up and slow down on oil useage. If it sat for along time the rings may be somewhat stuck in the ring gruves.

If the weather is not too cold use a 20W50 or 15W40 deisel oil. Are you leaking oil. Often when there is oil on the rear it is leaking & blowing back.