[trackbird]

As I was laying in my 40 degree garage today, changing the oil in my Camaro that had been parked since the night before, I remembered that most people seem to recommend changing oil when it is hot, so it drains better.

Now, my question is.

If oil is thin when cold (for start up protection) and gets thicker when it heats up, is it really a good idea to change it "hot". It did seem to take a while for the last of the oil to drain today, but I'm not sure that it should have. It was just an observation, early today, before I really woke up. So, if it is thin cold, and "thick" hot, shouldn't we change it cold? Or should we?

Just wondered what everyone else thought.....


(Nata, if this "takes off", kick it to engines or I will, it's a "general question" for now, isn't it?)

[trackbird]

I was thinking about the "thickeners" (additives) that are used to get the oil to "30 weight", etc. And thinking that if it was supposed to pump cold, and then thicken at higher temps, then it should be thinner when cold. But, it makes sense that it pumps "anyway" cold and stays "sorta thick" when hot. Like I said, ramblings of a greasy madman. I guess I was expecting more from the specs than actually occurs. I do usually change it warm, but yesterday, I didn't run the car first.