When I was at Rainbow's End Escpaees park south of Livingston, I had my oil and tranny changes done by RV Mobile Lube, 866-785-823, email firstname.lastname@example.org
, web site www.rvmobilelube.com
--- they have two mobile trucks. They are out of Houston, but come as far as Livingston to do RV service. I'll use them again if I am in the area when I need the service next year.