I’m sure this has been discussed before I just cant find it.I am running 20 w 50 oil. I have been considering a synthetic oil and I have been doing some research . I know that some of you use it and some don’t.I have read that it is good because it clings to the internal engine parts so the engine is oiled at start up. Is it true that the engine will run cooler. I saw where Brad Penn makes a partial synthetic . What is that? If I do use it should I go with 20w 50