quote:You are talking about 5w vs 10w. Of course that will make a difference in cold starting.
I will probably be using Castrol Edge 0W-20 in my cars during the winter time because I sometimes do short trip driving and I want the oil to get up to operating temperature as fast as possible.
I have to use what is best for my cars and if the Castrol Edge turns out that it is not the best then it is back to Pennzoil Platinum.
My style of driving does not allow me to do extended drains.