When on the road I use Ford car dealerships. I use the Ford web site to find where they are along my route and call service to see if they service motorhomes, I'd say about 30% do. My 1st oil change on the road was Metro International Truck in Moncton NB $128, I wont go there again. After that thru the years
Hoskins Ford , Smithers BC $45
Vincennes Ford, Vicennes IN $21
West Ward Ford, Neepawa MAN $37
Bluebonnet Ford, New Braunfels TX, (part of 35K Maint.)
McKie Ford, Rapid, City SD, $47
Knightlinger Ford, Coudersport PA $36
Also my local Armstrong Ford (Homestead 20 Miles north) works on RVs