Diesel JD
Full Access Member
Hey folks. Justin's fuel economy thread has got me to thinking about if synthetics are a good idea for my motor. I recall some member here used Rotella's synthetic blend with good results unless it was the 5w/40 synthetic. Would I be less likely to have leaks and such during the adjustment phase on my old 6.9. I'm also interested in using some sort of syn. oils in my T19 and in my 10.25. Anyone have thoughts or experience on the synthetic blend? Good idea or just stay with dino or go all the way syn.?