Although I run full synthetic in my vehicles, I plan to stick with the Motorcraft 5w-20 syn blend for the my motor home. My reason is simple...I have to change it every 6 months or 7500 miles according to the manual to maintain my vehicle / power train warranty. My oil changes will very likely follow the 6 month rule rather than mileage because i just won't put that many miles on the RV before the 6 month time period hits. Using a full synthetic would just be pouring money down the drain in my opinion. Any syn blend will do however, the Motorcraft can be found at Walmart pretty cheap so....I will likely just go with that. If you don't mind spending the extra $$'s, Syn is a great option...just need to evaluate the need for it based on your intended frequency of use to see if it makes sense for your situation.
