PeachParts Mercedes-Benz Forum - View Single Post - Poor fuel economy with B-20!

aklim · #9 04-08-2005, 10:53 PM

I have noticed a significant loss of mpg. Normally I get over 600 per full tank and with this one station I get around 550. Switched and got over 600, switched back got around 550. Did the test a couple of times and am convinced that the D2 at this shop is not the greatest. What does this mean? Well, lets say the shop you got the B20 from is getting the diesel from the same supplier or the same quality as i did at this one stop, mixes 4 parts of it with 1 part of B100 to get your B20, it could be the bad diesel part that is screwing up your mpg. Why don't you do what I did and get it from the usual source when your tank is empty and test it out. Of course, I would change the filters if they are dirty or even suspect, as in this case.