Hello together drive about 20000 km a year, would like to have an autogas system installed. have many questions: have read, my Mazda 626GF Bj 1999 has gas-resistant valves, so that no flash lube is needed. you can install BRC, Prinz or others, which system is it best? what is semi-automatic or full sequential system? many report that already 60-80 tkm have driven without problems with gas, is it the limit, or is it going on? currently I have 145tkm. to go to additionally needed any maintenance? and above all: WO installed (residential in Duisburg)? has offer of Autogas-King for 1650 Euro, but on the Internet there are many negative reports about this company… Thanks in advance!