Update from last Friday: Our good friend from the far east found us a donor 98 Jetta for a song up in Salem, so late in the day I made tracks up there to get it with my TDI Eurovan with a tow dolly. Total mileage on the way there was 35.4 mpg towing the empty dolly. Some other random data points on the outbound trip:
9.0 psi boost
850* F EGT (exhaust gas temp, pre-turbine)
60* F IAT (intake air temp)
My EV did great on the return trip, and for towing I really like the low gearing of the CHP trans (1-4th anyway). Mileage for the return trip to Corvallis with Jetta in tow was 28.8, with a combined total avg round trip of 32.1 mpg. Here are some gauge pics of the return trip on I-5 towing the Jetta back to Corvallis:
This pic is climbing the Salem hill just south of Salem on I-5. Doing this hill in 4th gear to compare EGTs, which are holding right about at 850* F. Jetta in tow.
And this pic is in 5th gear coming down the other side of the hill.