Jrcat-Thanks for the spec. link !!! I didn't know that existed. I wounder if there is one avail. for older machinery. W/ 7-8 hrs. on the timer in average mountain skidding the 518's that ive been around wre going through 17-25 gallons a day. The JD's would use less fuel but could not skid the same ground a 518, but the JD's are a faster machine, I will give them that. Way diff. tranny's.
The missus is only burning about 4 gallons a day, and that's if I get real ambitious and go for two loads, pulling a medium steep hill and some largish hemlock.
I could feasibly get 3 loads out of her if I beat on her and myself but what would be the point in that?