blown32

Just a crazy thought:

I have some NEW motor oil that I will no longer need (several gallons). I see some folks talking about running their used oil in the fuel tank. I would not be comfortable with that (even though many report many many trouble free miles). But....

What do you guys think about a small amount of new oil each fill? Something like 1 quart?

I am not planning on doing this as I am sure I would eventually use the oil, even if it’s just to dip pistons in prior to engine assembly or to run it for the 20 min cam break-in period then dump (recycle) it.

I am just curious as to what folks think of it.

Are their any benefits?

Any drawbacks?

Just thought it might be interesting to think about

Geico266

Not a problem at all. 1-2 quarts per tank will not harm the engine at all.

kd460

Actually, I think cummins said 5% is fine. They reccomend 5% with (I forget the name) their oil recycling machine. Basically it is a super duper filtration machine desined for used engine oil. They say 5% of this is cool. So, if it is new oil, I would think you could use the same amount. Kevin

infidel

No problem for the engine with the oil but for lubricity per dollar you are money ahead to use a designed for diesel fuel additive.

blown32

I agree that just about any made for the application product would work better (much better). I use PS and some Lucas in each tank. If I did this, it would be just to use up oil that has been sitting for a few years and will likely sit for a few more. The thought would be to burn it instead of store it or giving it away. Might use it inplace of the Lucas but continue the PS.

redneckonthenet

I have been burning used (filtered) motor oil in mine since the day I got it. Mine gets a gallon and a half per fill-up. 36 gallon x 5% = 1.8 gallons. Smokes a little most under heavy accel. Cant figure new oil would be any worse!

Equalizer 2

As he has a 04.5 with the Cat Convertor and I have the same is there any chance of causing problems with the Cat?

Dr. Evil

If youre going to use new oil get 30 wt non detergent. Its real cheap at walmart.