Converting the Diesel Suburban to Veggie

The conversion of our ’96 Diesel Suburban to 100% used vegetable oil (not biodiesel and definitely not diesel secret junk) continues. Over the years, we have worked with a variety of parts, always fine tuning and improving the system. Here are the parts for our conversion:

Coolant heated fuel pickup / tank heater –
Heats the fuel at point of pickup, doesn’t require complete tank heating.

Electric lift pump –
Take the load off your injector pump, mount at veggie tank.

2 Heavy duty, high volume 3 port fuel valves –
The most reliable way to switch from the diesel to the veggie system. Stay away from the problematic Pollak valves.

Coolant Heated Filter –
The diesel and vegetable systems are separate, with their own filters.

Electric Injector pump fuel heater –
On startup, there is cold veggie in the lines up front and in the valves that does not get heated. When switching from diesel to hot veggie, this “slug” of cold veggie hits the injector pump first. The electric IP heater mounted right at the input of the injector pump eliminates this possibility.

PMD relocator kit –
Relocating the fuel computer module from the injector pump is a necessity in this model vehicle. There are two 500 watt transistors that produce quite a bit of heat, and the extra heat from the hot veggie is enough to give it fits.

More detail on past conversions and collecting and filtering vegetable oil can be found at