Omnitek Engineering Corp. announced the U.S. Environmental Protection Agency (EPA) has approved the company's submission for its diesel-to-natural gas conversion technology for the widely operated line of heavy-duty Navistar DT466E and DT530E engines under specific and rigorous criteria related to the agency's Outside Useful Life definition. The Navistar DT466E and DT530E engines were produced in 130 different configurations from 1996 through 2003, representing an estimated addressable market of 1.5 million potential conversions.

Industry sources estimate the total number of heavy-duty diesel trucks in the USA exceeds eight million and the large majority of these trucks could benefit from Omnitek's patented technology.