What type of fluid should I use ine the front differential on a 2006 F-150.
The owner's manual and all auto part stores say use 80w-90. But the parts guys and the ford dealership say its supposed to be 75w-140. Which should I use?
I think both would be OK but I would go with the dealership recommendation. They should be more aware of recent changes than a parts store clerk.
the dealer knows best.
the rear should be 75-140 the front takes 80-90
both will work fine but 75-140 is more expensive its synthetic. parts guy wants to make more money. owners manual is more reliable than someone who gets paid commission.
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