Haven't checked the 0-60 times unloaded. I can do that once I'm fully unloaded. It doesn't have any trouble climbing the passes unloaded. In fact, in the past even with 2 people and 2 canoes on top, I thought it flew up there. I seemed to have crossed some kind of divide with this load.
Filters are pretty new. I know what it feels like to have plugged filters and I don't think that was going on. My 77 NA wouldn't have made it 10 miles out of Denver with that load.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13