1997 ram 3500 4X4 320K
been running veggie oil almost five years now, two tank system, use a manual tank switch vale under my seat (never misses!). The one most important thing i have learned is to run the return line back to an aux filter unit behind the lift pump, this has twofold benefit. (1) keeps fuel hot! (2) keeps everything purged on diesel switch back. and you can get by with just one three port switch.....less air issues.
hope this helps someone.
Veggie T

