Winnebago Aspect 27k

Dick thanks for the info.I think I already know what the answer is,but why are low generator hours bad.And to Avan.Besides are 35 an 40 footers which are powered by Cummings ISL's and Detroit 50 series.The public transit company I worked for also had a fleet para transit cutaways powered by the ford triton v-10 triton.A few years back,ford was having some issues with it blowing spark plugs wright out of the heads.Ford came up with a tool to repair the threads without having to pull the cyl.heads.Are company bought the tool,but we've never had to use it.But we are starting to have head problems at around 90k miles or so.We aren't exactly sure why,but we're guessing it might have to do with the direct injection.But with that said,you have to remember that around Bay Area here it's all hills. So the miles are hard hard miles which is brutal on the power train,that you don't see under normal driving conditions.So I wouldn't be concerned about it.The question I have for you is,what kind of gas mileage are you getting when your pulling a towed.

Chuck