Yeah it definitely applies to the older cars more but if you beat on a cold engine you will always get the same type of engine damage as a result. The pistons are aluminum in a cast iron sleeve/cylinder. They don't make the correct clearance until they are at operating temp. So beating on a cold engine results in scored pistons and compression loss. Just driving easy will probably have no Ill effects but why even chance it. Anyway, I want heat! And it's not safe driving with a frosted up windshield. Plus it's warm if I ever do need to give it some gas. Its got more power when its warmed up.
Maybe some engines would benefit if the oil is warmed up and flowing better. 3800s seem to have very good oiling systems that build up pretty fast.
