Be interested in what you find out Scott, here's a couple of links.... http://www.drive.com.au/Editorial/ArticleD...=37517&vf=1 "The Aurion's kit was developed by Victorian companies Apollo Gas Products and Lpgas1. Lpgas1 director Brett Coventry says the Aurion's system produces a 5 per cent power improvement over conventional LPG systems and a 50 per cent reduction in operating costs compared with petrol. The company says the Aurion's LPG kit is compliant with Euro IV emission requirements and is covered by a three-year, 100,000km warranty. Toyota Australia says the conversion kit does not alter the car's factory warranty providing it's correctly installed." http://www.news.com.au/couriermail/story/0...5010760,00.html "The kit uses the Toyota electronic control unit (ECU) which means all the Toyota features are also optimised on LPG," said Brett Coventry, director of Lpgas1 which produces the kit's specialised bracketing, wiring and programming. "It starts on petrol and automatically moves over to gas. "If you run out of gas it moves back to petrol again. You'd never know the difference, though, because the system offers no power loss." Coventry said the system produced a 5 per cent power improvement over conventional air valve and venturi LPG systems and a 50 per cent reduction in operating costs compared with petrol."