The Contribution of Engine Oil to Diesel Exhaust Particulate Emissions

Diesel Soot Oxidation under Controlled Conditions

“…Small amounts of metallic compounds have also been reported [Roessler et al, 1981]. Mayer et al [1980] found that up to 25% of the total mass of their particulate matter came from the engine oil, the amount varying with engine operating condition.…”

1-Nitropyrene in Used Diesel Engine Oil

“…1 This raises the possibility that the 1-nitropyrene in the exhaust is coming from the crankcase oil, having formed or accumulated there. 2 To evaluate this possibility, 1-nitropyrene exhaust emissions from a light-duty diesel vehicle were measured, along with the 1-nitropyrene content of its engine oil and of new oil.…”

The Effects of Long Term High Idle Operation on Diesel Engines

“…A recent General Motors Research Laboratories study (17) indicated that lubricating oil contributed from 50 to 280 ti.-es as much material to particulate emissions (solid and lz.id) as would be expected on the basis of its consumption rea-ive to fuel.…”