AMassaro said:What about the guys who use their used engine oil for an additive. I haven't done it yet but it doesn't sound like a bad idea as long as you filter it first. Anyone here do that?
Used lube oil has a lot of bad stuff in it that can't be simply filtered out. Put simply, bad idea.
If you really want to be cheap you might consider cheap two stroke oil. It should readily mix with the fuel and provide some lubrication. It's designed to be burned so I don't see any harm. OTH, I'll stick with products specifically formulated for our diesels.