Hi there is here anybody, who has a LPG injection installed ? My STS is about to be converted. The cost for the LPG will be about 40% less, including the fuel, needed for the cold start (premium fuel $2,177 and LPG $1,08 in germany) You have to drive the car, till the water-temp will hit 30°C, then the ecu automatically switches to LPG. Flash-lube (valve protection) will bee installed, too. My question.... what about the valves? It is no secret, that some cars have very soft v