Re: Couple questions.
There's a little valve train noise upon startup and it usually goes away or quiets down when the engine warms up. If the car has sat idle for a while, the noise is more noticeable. I'm partial to Mobil1 full synthetic. If I was driving either car in the winter, I'd stick with straight 0W-40. Since mine are summer cars and I can get 5W-30 cheaper in 5 qt jugs, I use one of those + 3 quarts of 0W-40. If I lived in FL or AZ, I might consider 10W in the summer. I change the oil and filter before storing for the winter, so mileage can range from 3-10k over the summer. End of story.