2500

got a 97 too... look inside your owners manual. states it's ok to run used motor oil. been awhile since I looked at it, don't remember amount recommended.

GAmes

You need to read it again. Page 128

"Lube oil blending with the fuel is not permissable. Damage to the catalyst will result"

Doesn't sound like a recommendation from Dodge or a suggestion from Cummins to me.

2500

ok.. thanks.. could have swore I read somewhere in a cummins manual that it was OK to use a small percentage of engine oil.

Bodean

I work in a lab with the USAF and do a flash point on JP8 everyday. It ranges between 120 and 135 degrees. Diesel flash point is very much like the Jet fuel. I would think a gallon per fill up wouldn't hurt anything. I am going to try it in the future.

Later,

95dodgectd

im pretty sure catalyst is the same as a catalytic converter, and i don't know about you, but not many people with 12v's have one on there truck wether they took it off and the truck never came with one. my exhaust consists of a 4" downpipe to a 2ft section of 4" to my 6" stack so theres nothing to get clogged.

Cougsfan

I guess I would still worry about carbon build-up in the combustion chamber and dirty injectors. I agree that filtering it somehow would be fairly important prerequisite too. But it probably burns pretty dirty even if filtered. Anyone tore down an engine after burning a considerable amount of used motor oil?

wcbcruzer

I was actually going to go ahead and give this a shot, about a gallon. BUT I realized that when I change my oil I only get about 3 gallons every 5-6k miles. That's $12 worth of fuel over the course of 5k miles... Not worth it imo.

stackx2

i take mine right from the oil pan strait to the tank i ran 6 gal once got a little stinky but ran perfect

GAmes

Whether or not you have a catalyctic converter installed isn't the point. Neither Dodge or Cummins recommends adding motor oil to the fuel, as was suggested. Next, some fool is going to exclaim that adding toothpaste to the oil will clean the valves.

CamperAndy

I heard it works and for sure the truck will not have cavities just mix it with a little acetone

cincydiesel

I prefer Crest over Colgate. I see less smoke with the Crest and about a 2mpg increase over the other brand.

GAmes

Don't stop with acetone!! How about a brew including ATF, 2-cycle oil and vegetable oil plus some V-8 so you won't get clunked on the forehead.

bob4x4

Due a lil more research Cummins actually has had systems built in that would pump waste oil into fuel system then refill crankcase with fresh oil on the fly.

My injectors are running smoother after running waste oil

Bob

Chaser

My 08 say 15% bio diesel, WMO will it work at do no harm???

pind

just an FYI

The cummins system was called Centinel.

Basically automatically took oil from the crankcase end of the unit, and pushed it back to the fuel tanks. Engine oil was replenished from an OEM supplied make-up oil tank mounted on board.

Worked fairly well, however, with the attention span of most operators these days, I don't see the make up tank getting checked often enough, would probably lead to problems down the road.