I wouldn't go as far as to say that. I will say that most DA engines 100cc and larger are being used for IMAC. That means lots of use. When I was at the top of my game I was burning 5 gallons a week every week for 3 years. Then when somthing just wasn't quite right with fhe engine it was sent in although that didnt happen very often at all. Most of the Chinese engines are being used by sport pilots and IMO dont get tje same amount of hours and are not being judged at the same level. Example, most sport guys love their DLE 55 engines, I hated mine. Mainly because I was judging it to the same level as my DA 50.