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RE: Less contaminants?
By MrPoletski on 7/10/2009 9:41:15 AM , Rating: 2
That's certainly why lead was added to petrol in the past, but I question the need of a diesel engine to self lubricate with any compound other than diesel itself.

I could also be wrong on that point though;)

RE: Less contaminants?
By FITCamaro on 7/10/2009 10:13:31 AM , Rating: 1
So diesels shouldn't need motor oil?

RE: Less contaminants?
By PandaBear on 7/10/2009 6:50:38 PM , Rating: 2
It still does, but the combustion chamber design is different and has higher combustion, that you need to have more lubricity in the fuel as well. Bio diesel with ester (soy bean oil or refined from waste vegetable oil) and crude based diesel with high sulfur would work.

RE: Less contaminants?
By Alexvrb on 7/10/2009 10:10:15 PM , Rating: 2
The problem is that they're taking almost all the sulfur out of crude-derived diesel, and that they rarely add enough/any additional lubricant in biodiesel. This is less of an issue with newer models that are designed for ultra low sulfur diesel. However, having no sulfur at all may still cause accelerated wear of the pump and injectors over time. For older models, it is much worse. If ultra low sulfur diesel is all that is available, for older models I would recommend using a diesel fuel lubricity supplement, with every fill up. It's not expensive if you buy it in large containers and take a little bottle of it with you whenever you fill up. Heck, Power Service (and probably others) sell an additive that cleans injectors, boosts cetane, and adds additional lubricity to the fuel.

