I have had both a diesel pusher and a few gas motor homes. All of the previous comments are correct, particularly the ease of cruising on hilly terrain with a diesel. After 52 years of driving gas powered vehicles, I never had a problem with a poor tankful of gasoline, however, during the eight years that we owned a diesel pusher we got a tankful of bad diesel that affected the big engine and the generator. I don't know if contaminated diesel is more common that contaminated gasoline. Also, our diesel pusher had two fuel filters, an oil filter, and a monstrous air filter. Replacing all of them was expensive.
We had air brakes and air suspension, so the motor home braked very well and rode like on a cloud.
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