RE: GM likes CNG for its trucks: CUM-WPT engines?I always laugh when I see blunders like this:
Lukes says GM-built engines for LPG and CNG would have "hardened valve seals and so forth for long-term durability. You could have trouble at 70,000 - 80,000 miles if you don't have the proper materials," he says.
Obviously Lukes knows nothing about how an engine works.