I recently purchased a class A that has 58K on the odometer. Supposedly, but I don't have the records to prove it, the engine and trans were both replaced at 30K. Currently, my coach is a monument to deferred maintenance, so I can well imagine that the engine and trans had to be replaced based on the lack of maintenance I've seen throughout this rig. However, the 460 V8 engine runs very good and shifts very well with no lubricant leaks or other issues, so maybe the engine and trans actually have only 28K on them. My future plans are to explore North America in yearly 5,000 mile loops, staying mainly on interstate highways with the RV (I'll explore the back roads with my 25mpg Dodge Caravan and a small 60mpg motorcycle). I'm figuring that with mainly steady speed highway driving and sticking with Mobil 1 synthetic oil and an oil change interval of once a year or 5,000 miles, should be more than adequate for the type of usage I'll be subjecting the rig to. I'm hoping with the this maintenance schedule I can expect to get another 50K out of the engine before I have to start worrying about its future.
BTW the Dodge Caravan I sold with 286K had 151K on it when I bought it used. It hadn't been maintained well and the first thing I did was replace the noisy varnish encrusted valve lifters. Nonetheless, other than parts like timing belts and water pumps, the engine was literally trouble free for the 136K I owned it (using Mobil 1 synthetic oil and an 8K oil change interval). However, like I said, RV usage appears to be a much different thing, which is why I'm asking questions.
Steve
