B or B+ (or even a small C?)

bobojay5 wrote:

Davydd wrote:

obgraham wrote:
Perhaps a little off topic, but from another forum: Mercedes (Sprinters now) and others are advising that use of Biodiesel above 5% risks engine damage and voids the warranty. Some folks are finding almost all the diesel in some areas, mostly East Coast, is 20%, and are having to run around looking for B5.

I've never had that problem running a big Caterpillar, but are B-folks, with smaller tanks, running into this issue?

First, I haven't seen anything greater than 5% biodiesel with extensive traveling yet and secondly, I don't know how true that advice is.

David & obgraham, Mercedes recommends nothing over 5%, but the key there is burning nothing over 5%. I see pumps that say contains up 5 to 20% biodiesel all the time around here and in Oklahoma and north Texas, mostly at Loves & Pilot/Flying J.
My way around that is not to go below 1/2 tank, (which is my bladder limit nowadays), and never fill up at those bio locations more than once in a row.

Mercedes is going to have to make some changes to their specs soon because all the other light duty diesel makers, (Ford Transit, Promaster and GM Duramax), are now okaying up to 20% usage in their diesels

Do you suppose M-B policy is just a line in the sand, foot in the mouth liability issue or would they have to physically modify their diesel engines? I'm thinking they recently went from a 10,000 mile service interval to a 15,000 mile service interval. That's a big leap and I doubt they did much or anything to make that possible.