Posted by Traveler on September 22, 04 at 19:01:12:
In Reply to: Should I drain differential after adding dino oil to the synthetic? posted by Louie65 on September 22, 04 at 12:48:56:
Agree with Jake and Bish but add:
It should be changed somewhere under 10K miles IMHO to get out the break-in metal particles. After that you can usually get away with syn oil for 25 - 50K miles before changing. Towing will drop that rapidly.
If you have never changed it, then at the next major service do so. Then every 25K + - along with all the other driveline fluids.