Portland, Larry is a neat guy with a dream oil setup. He had a bunch of information from all his experiences and had tinkered a nice system together, with lots of filters, a pump that had no problem reaching our tank. He took a good look at our system and had some great suggestions, like adding a vacuum gage, so you can tell when the filter is getting plugged up. He also helped us put a switch in so we could turn that Vegtherm off. The Vegtherm Mega heats up real fast, and allows us to switch over within a couple of miles from Diesel (in spring weather), so the whole 2800 mile trip required less than half a tank of diesel, not bad huh? We took him out to his favorite mexican food place, and were very grateful for all the info and tips he had. Not to mention his clean oil. He was working on a custom tank that would allow him to drive half the country and back on his own oil. His Duramax would get 17-18 miles to the gallon. He mentioned one bad experience with a person who gave him the bottom of the barrel, and ended up replacing fuel filters every 100 miles, this was a good caution for us. Luckily we only changed filter once the whole trip, and that could have been premature, as some of the air was leaking out of a rear tire, thus giving the feeling of less power.