I used the proscribed break-in oil for the first 50 hrs or so and changed to synthetic Mobil 1 - 5w40 Turbo Diesel.
Have used it for the past 4 years. Great oil! Cold starts and warmup are a monumental difference from the conventional oils that I've used in the past!
Just this past year or so - I switch over to John Deere 0w40 synthetic. It has been just as good a performing lubricant as the Mobil 1 - IMO.
Planning to convert every engine on my place to the JD synthetic.
AKfish
AK,
What's the number on the 0w40 Deere oil? My guy gave me 5w30 Torq-gard supreme (ty22064) but I don't think it's synthetic.
Rob