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PuroCumminsPower · 07-16-2021, **(Subject: Is 100% biodiesel okay in Cummins 871? )**

One of the places I fuel at I noticed went from 5-20% biodiesel to know has a sticker that says 100% biodiesel. Is this okay for my Cummins 871 with M M tune?
Thanks.

Rawze · 07-16-2021, **(Subject: Is 100% biodiesel okay in Cummins 871? )**

just make sure you have a 10 micron davco installed to catch the higher ashphaltine rates in the fuel.

smorgan87 · 07-16-2021, **(Subject: Is 100% biodiesel okay in Cummins 871? )**

Long as the dpf has been africanized. Just be prepared for significantly less mpg and as rawze said use the 10 micron filter and have spares ready.

Chamberpains · 07-16-2021, **(Subject: Is 100% biodiesel okay in Cummins 871? )**

My cm870 loved bio fuel. It got better fuel mileage but it went screaming through fuel filters. I haven't had an opportunity to get any in my cm871 yet. Where are you getting 100% bio?

PuroCumminsPower · 08-03-2021, **(Subject: Is 100% biodiesel okay in Cummins 871? )**

I fuel at 3 different locations in California. W.H Breshars. Atwater, CA ;Modesto, CA ; Newman, CA all 3 are now 100% biodiesel. A month ago it was a blend of biodiesel.

PuroCumminsPower · 08-03-2021, **(Subject: Is 100% biodiesel okay in Cummins 871? )**

Will 100% biodiesel effect my 2010 THERMOKING Apu? Started acting up on me today. Hoping it’s not because of the 100% biodiesel.

JimT · 08-03-2021, **(Subject: Is 100% biodiesel okay in Cummins 871? )**

It should be noted also that Fleetguard has different water separator filters for use with biodiesel fuels. Not exactly sure what the difference is, other than I think a green o-ring instead of black. Probably not a big deal for typical 5-20% blended fuel, but if you're running 100% bio then you might want to look into it.