We have a 2011 29' motorhome with a V10 engine. I took it in for an oil change at the dealer yesterday and was told I should change oil every 3,000 miles. What do you think/do?
Ford put a 5000 mile interval in the user manual and service manual, and has since stretched that to 7500 miles across the board for trucks (but then, a RV is not used like a truck and will likely be serviced on time rather than mileage).
If a "service adviser" at a dealer is selling a 3000 mile oil change, it is because he is working for a commission. I hate that this has happened, but it is now part of the structure of the automobile service business today.