Yes, you can run used motor oil in your car!! - PeachParts Mercedes-Benz Forum

lc007 · #1 06-16-2008, 02:54 AM

Quote:

Originally Posted by gsxr

Running used motor oil, filtered or not, in your fuel tank in large quantities is not necessarily a good thing to do. At least not to a car you care about. I have a VW Dasher Diesel beater that I wouldn't think twice about feeding used/filtered oil as fuel, but I'd never put it in my MB. There are fine particles that you can't filter out, which don't do nice things to injection pumps and injectors at 2000psi. It's up to you, though. BTW, I think re-using the 9-hour Delo in your crankcase is fantastic!

What about a thermo depolymerization process. I am currently running wste motor oil as a testing and it works well though plugs my filter after 100 miles or so. I was told you could break down the carbon build up and polymeres through this process.

gsxr · #2 06-16-2008, 10:24 AM

Quote:

Originally Posted by lc007

What about a thermo depolymerization process. I am currently running wste motor oil as a testing and it works well though plugs my filter after 100 miles or so. I was told you could break down the carbon build up and polymeres through this process.

The fact that your filter plugs in about 100 miles should tell you a lot. There are commercial heaters that are designed to burn waste oil, generally a furnace of some sort used to heat a workshop or other good-size building. But your MB diesel just wasn't made to burn used motor oil (or ATF). I really have no idea if messing with the polymers will reduce your filter plugging or not, but as I said in my last post, I wouldn't do this on a car you care about...