[xfeejayx]

I think it's going to vary significantly Brian. It's going to depend on how long you idle vs. how fast you drive if you don't preheat, the temp outside if you're running cold. I don't see us getting a sure answer to this.

On Jdms note, I don't completely agree. Until we figure out how to make rings seal to cylinders the same way while both hot and cold, I think I'll wait the minute or two to warm up. Increasing cylinder pressure before the engine has come to a temperature where it can seal the combustion chamber properly doesn't sound like too great an idea to me. You'd be dumping a lot of your compression due to lack of sealing anyway.

cylinders nowadays are form/hot honed, meaning that they are honed while they are at operating temperature. So the cylinders aren't even circles until they are hot.

However, if you are in gear and barely giving it throttle, the engine isn't anywhere close to max peak pressure, so you might be okay as long as "a little slower and gentler" means "A LOT slower and gentler". But its going to be a while before i can talk myself into getting in and going.