For my 32 footer, it's usually a Ford Dealership. The pricing has varied from $39 at Pacific Ford to $89 at Elsinore Ford (they say cause it's an RV they have to charge more). The only truck Ford place was at Carmenita Ford for $89. All in S. Cal. Wish I were in OK for a $19 change. Must have an oil well on property! I definitely no longer trust my RV dealer. But have used and do trust Camping World, $50?. After all an oil change isn't complex, how much can go wrong? Although I did get shorted a quart at Allen tire, just once. My driveway is too small to even park it in or would do it myself.