The Vegistroke is Crawford's name for the WVO-converter and Crawford is always ready with a reason why it is the best WVO-conversion system for 1999-2004 PowerStroke trucks (for example, he says it not only "Great for the environment" but also "Deadhead, and Grateful"). Crawford says, "The FN74 Vegistroke system will start on diesel, switch to oil, and shut down on diesel without touching a switch. And it does this with no Switching Solenoids!!" (Note the exclamation marks? I told you he was excited about his product). He claims he's driven over 75,000 miles on veggie oil and continues to be "ready to roll!!" Keep on truckin', Jason.