Bedlam wrote:
My 6.0 Powerstroke liked running on B10 due to the additional lubricity in the fuel and I actually got better mileage with it than running straight ULSD with a friction modifier. If I remember correctly, that era of Powerstroke was only certified for B5 even though I ran a greater bio mix. My 6.7 Cummins is rated for B20 and I see no difference in performance or mileage between B20 and straight ULSD.
I run bio in my both 7.3's and and both 6.0's of a summer, winter I use straight #2 Diesel. As stated it has more lubrication and the injectors are a little quieter. My neighbor uses it in his Cummins as well. Don't know enough about modern Diesels to have a opinion on how it works in them.
