hheynow is correct about the 5% and the warranty. I have not had any problems other than the filter getting plugged once. I really like BIO and I do run B99.
i was told to use fords motorcraft 10w 30. when i purchased the truck they gave me 3 yrs worth of oil changes. dont hold me to this but, I THINK... i was told that the injectors or something use the oil to fire. since i live in utah and it snows, the 10w30 would help the engine fire over easier duing winter...maybe some other guys on here could correct me if im wrong...
thx