Just had a question for you folks. When is it ok to change out the old dino oil and replace it with synthetic? I just changed our oil at about 10,000 miles, second change, and wonder if I should loo...
At 7000 miles switched to Rotella T Synthetic. At 3000 miles switched to TranSynd in the tranny - filled and drained twice and changed the external filter. Changed the rear diff fluid after 600 miles of towing and again when I installed a PML diff cover (Mobil 1 synthetic gear oil 75X90)