Z71 Kris
Independence...
Unless you live in a really cold climate, stick with the 5W-30. The first number (5W) in a non straight weight oil is its ability to flow when cold. The lower the number, the better it flows. So, in the cold (32*F or colder) a 5W will flow better then a 10W, and a 10W will flow better than a 15W, etc... Contrary to popular belief, the W in 5W does not stand for weight. It stands for winter.
The second number in 5W-30 is the oils actual weight; 30. The weight reflects an oils ability to flow when its hot. The higher then number, the better it flows. A 40 weight will flow better then a 30 weight when hot (212*F or higher), a 30 weight will flow better then a 20 weight, etc....
So, when we add these two together we get 5W (the oils ability to flow cold) and 30, (the oils ability to flow hot). Make sense?
Now, be careful. Also on the market are straight grade oils. These oils are only measured in weight (ex; 30 weight) because they are not intended to be used in cold weather. Lawn mowers, hedge trimmers, etc... usually use a straight weight oil.
good stuff!
Now another dummy question, where should I put the jack to jack front, and where should I place jack stands? Next question is I want to rotate the tires, drop the fronts back and bring the backs up and cross them, but I have a jack and one set of stands, any ideas of how to do that?