inputs.text: great product - controller converting dozen vehicles first time ive used vocontroller installed greasecars copilot simple lacks essential features fuel pressure readout return valve delay electric heater control vehicle various drivers dont want train drive vegoil powered vehicle controller safeguards unpurged shutdowns minimizes diesel consumption customizable settings main advantages return delay option saves 5 gal diesel every time switch vegoil pressure reading low pressure switch diesel need purchase transducer separately electric heater control vocontroller easy install program reprogram installed desired adjustments extensive manual provided