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Originally Posted by moparguy
cj, thanks for taking time to post. I may have to give this stuff a try in the old 12valve.
RJR
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I have been running nothing but B20 in my two 12Vs since mid October. I have had no fuel filter problems so far. The trucks run great and although the coldest morning here so far has been 18 no problems starting or before warm up. Right now the 98 is down waiting for DTT parts, but the 95 is averaging 20+mpg this winter where it averaged only 18mpg on #2 last winter.
I did have a friend quit running it in his 04 D/A. That cold morning his truck started hesitating once he got on the I. We figured the cold was not allowing enough fuel to move through the filter.
I think we will wait to run any more through common rails till we get more info. The 06 op manuals still say limit it to 5%. That is probably good advice.