PeachParts Mercedes-Benz Forum - View Single Post

2.5Turbo · #2 02-12-2015, 02:02 AM

I would avoid adding anything to the fuel or oil except additives that say they're compatible with your DPF. Anything that burns and creates too much ash will eventually plug the DPF; this is why DPF equipped vehicles require low-SAPS oils. At least in my opinion, the high pressure pump and injectors were designed to work with ULSD and the harm some additives may do to the DPF outweighs the minimal benefits to the fuel system.

I'm not 100% sure but I believe up to B20 is OK in the common rail engines. Oil change intervals may need to be shorter when running B20; I know Chrysler lets me go half as long on the oil in my Jeep when running B20. I know all diesel fuel in Minnesota is required to be at least B10 during the summer months and will go to B20 in 2018, so I think you'll be fine.

I would plug in below zero, if anything to get the oil to where it's needed faster. It'll probably start at -20, but the oil won't be pumping as easily as if it was warmer.