iptman
SILVER Star
I agree. The factory aux tank in my 80 is one of my favorite mods (masterfully installed by @OTRAMM ). I wish it was more than 13 gallons but I figure that's almost 3 gas cans worth so that makes me feel better. Highest mileage I've seen on the 2 tanks is 500 (straight highway driving). I typically go 450 between fill ups.