kandewinn
Full Access Member
- Joined
- Mar 12, 2017
- Posts
- 857
- Reaction score
- 707
FWIW, my Dad always took his Navigator to Ford, they always refilled with the semi-synthetic. At 420,000 miles, he gave the Navigator to my brother. Engine nor Transmission were ever removed from the car, and it towed a 24' trailer full of concrete finishing supplies for 75% of its life. I think you will be safe with whatever Ford is using.
Ford always serviced my Gen1 same way, 100+K miles with zero issues on that as well.
Ford always serviced my Gen1 same way, 100+K miles with zero issues on that as well.