Hello everyone, so far I have been in the belief that the 5-cylinder volvo engine of the V70/S60 with 140/170 hp is the ideal engine for a gas conversion. My wife drives a V70 II without gas and I have thought of buying an S60, which is already converted or just one with a few kilometers, which is to be converted because I need a solid vehicle to commute and because of back problems no small cucumber with bad seats any more wants. But now my friendlic told me Volvo dealer, he always has customers with this engine in the workshop, who have problems with defective cylinder heads, one allegedly already has the third head always in the 30,000 km rhythm. Somehow I am confused now, especially since an ex-colleague of mine already drives 470,000 km on gas with a V70 I. What is true or right now? Can one make mistakes with the choice of the system? What must I pay attention to when buying? Thank you!