We are at 4750' and it is typical to be roaming at 6000 feet or above. However, not in a rush to reach a destination. I presently own a VW TDI Jetta and altitude does not bother it at all. Looking back, the original VW Diesel Rabbit was SLOW on the hills, but got there. If one goes to the Kubota engine site, the D1105 is manufactured in two versions, turbo and normally aspirated. Kind of disappointing they failed to make the jump. Love this forum and the participants, tired of the sites where the entire mindset is how fast a machine will go. I'm "orange" now with Kubota equipment, and wish to remain that way if possible. If not Kubota, then Honda.</P>