A two minute warm up is good for cars in winter, even with synthetic oil. Slow-ish speeds for a couple of miles will warm up the engine nicely. Keep in mind, wh

A two minute warm up is good for cars in winter, even with synthetic oil. Slow-ish speeds for a couple of miles will warm up the engine nicely. Keep in mind, when you start you vehicle on a cold morning, it high idles for a few minutes. This is by design. Great and interesting replies as usual. For my two cents, don't trust the dealer where you bought your car. My wife and I bought a new Ram truck in 2021, I asked the salesmen what are the engine break-in best practices. He said he didn't know, no surprise there, so he called the service manager. The manager told him to tell me there is NO break-in required for these new "crate engines" these days! I was shocked, so after I returned home I read the manual. It had concise instructions for breaking in both the engine and the transmission, which I was careful to do. There is plenty of stories on the web about the engine in my truck having upper engine problems, perhaps they believed the dealership.