There are way too many oil products and choices for your car it is almost confusing. Cars are expensive and so is the up keep. I am like eveyone else and I work too hard to waste money. But I want to buy the right product for my car to make it last. It is very hard to decide on the 5W-20 or the 5W-30. I know Ford "RECOMMENDS" 5W-20. I am leaning towards a 5W-30 or 0W-30 next change. You do want the 0W or 5W for when the oil is cold for a good start up circulation. The 20 or 30 weight viscosity does not come into play at start up - it comes into factor when the oil is hot. I hear also by using the 20 weight there is up to 30% more engine wear than by using 30 weight. Also which brand of oil to use. I do prefer a good synthetic but now I hear some synthetics because of government loop holes can be advertised as "Synthetic" but are truely not 100% - they are called a Group III Petroleum based synthetic and they are cheaper to make but still can label as synthetic. Your true Synthetics is your Group IV PAO synthetic and the only 2 true group IV I can find right now is Amsoil and Mobil 1. I am sure there must be more Group IV but if you want a true Synthetic I guess it is important to read labels to find out if you are getting a Group III or Group IV Synthetic. Also do you stretch these oils to 12 months/ 10,000? I would think with a good filter or at least if nothing else change the filter at the 1/2 way point of 6 months/5,000. Then you can just top off a little oil with what you lose in the filter. The reason I feel you can extend the oil change that long is only because 8 quarts is a lot of oil. Look at the cars of yesteryear when they only contained 4 quarts. Even BMW does not have 8 quarts and the dealer won't change it until 13 months/15,000. The bottom line is no matter who you ask everyone will have a diffent view so all I can say is at least with the internet we can do a whole lot more research (that is how I found out about the Group III and Group IV Synthetics) and then make your best choice. Happy Motoring and like me I hope you find the best for your car and a long motor:bigthumbsup life.