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V.O. Tech is the next generation of vegetable oil-powered diesel engine technology…

V.O. Tech, LLC, is a manufacturer of high-performance diesel-hybrid conversion systems that convert mechanical and electronic diesel-powered engines to operate on pure vegetable oil. Our state-of-the-art system has been tested and proven to outperform anything in the market. We are committed to providing our customers with the best possible conversion systems available.

Our advanced facility combines a fully equipped machine shop with some of the most sophisticated diagnostic tools available. This combination allows for rapid implementation of new design, immediate fabrication and the ability to work around OBD 2 equipped vehicles.

Our belief is that vegetable oil and your engine should reach operating temperature before switch-over…and they should stay there during operation.  Our research indicates that our system is the only one available which allows oil temperature monitoring before injection.  Although some systems rely on engine coolant temperature as a guide to determine switch-over time, we found this to be misleading, and potentially damaging to your engine.

Our company is committed to the philosophy of continuous improvement.

We are constantly designing and evaluating new products to ensure you get the best out of this technology.


Our paypal store will be available shortly; please be patient.


Member, National Vegoil Board



Made in the USA

Patent Pending all-in-one vegetable oil filter housing (the "Geo")


Our Featured Products

Oil Temperature Gauge (Analog)

Allows monitoring of vegetable oil temperature directly from the cockpit.


  • Displays 100 to 280 degrees  (f)
  • Illuminated dial
  • SAE Black Bezel
  • 90 degree pointer sweep
  • Includes temp. sending unit
  • Easy to install
  • Made in USA


Advantages of using vegetable oil as a fuel:

  • Environmentally friendly – closed carbon cycle (carbon neutral) and no sulfur
  • Saves you money! (far less costly compared to diesel)
  • Superior lubricating properties means a smoother running engine (no ‘knock’). You can actually hear your engine run quieter!
  • Less reliance on foreign oil
  • American farmers can benefit from increased demand for vegetable oil crops
  •  Less worry about fuel price fluctuations


All systems are currently being installed by Wally’s Super Service in Mahopac, NY. Please call for details on scheduling and pricing. We expect to have systems available shortly for those who wish to perform their own installation. Products can viewed on our Products page…


The Importance of Proper Temperature

In order to reach optimum viscosity and safe lubrication properties vegetable oil must be well over 120 degrees to be used safely.


Recent News…

Town of Mamaroneck launches veg. oil powered garbage truck

February 26, 2008 – The Town of Mamaroneck unveiled its used vegetable oil powered garbage collection truck. V.O. Tech completed this conversion to allow it to run on straight vegetable oil. This working veggie garbage truck is believed to be the first of its kind in New York State.

Mamaroneck press release


Westchester County unveils "Veggie Van" powered by V.O. Tech’s vegetable oil system

Westchester County’s new "Veggie Van," will be used for education and to raise the level of public awareness regarding a variety of alternative fuels, including the use of vegetable oil in diesel engines.

We applaud County Executive Andrew J. Spano as a leader with vision and for his groundbreaking accomplishment on this conversion.

County’s official press release

WNBC News Story Here 



“If you’re spending as much on fuel as you do on groceries, conversion to vegetable oil may be something you want to consider.”
– Wally Little, 2005


Diesel Fuel Prices

Source: Energy Information Administration, Official Energy Statistics from the US Government