A few wooden blocks in stages and I drive my Coach up on to them for some extra room.Always have changed my own oil and while the coach is sitting there i get on my creeper with a flashlight and go nose to tail looking for anything obvious. I always fill my filter with oil before screwing it back on. Mobil 1 from Costco, quality oil and air filters, don't forget that air filter.
Wife is a beekeeper, they use old oil in cans on the legs of the hive stand to prevent ants from invading and ruining the hive. I return the used oil in the containers it came in then it gets used again.