I know that motor oil is like religion to some on the board......they have consummate faith in their favorites, and no others will do.
However, the reality is, they are all motor oil. Use the proper weight and classification as shown in your owners manual, and your car will be just fine.
I know people who have hundreds of thousands of miles on vehicles using plain old dino oil on regular intervals. I even have an old '94 Grand Cherokee that has never seen synthetic that has 175,000 on the clock and is running strong. Seeing as most don't keep their vehicles for that many years or for that many miles, and you can get that life and better awith conventional oil, what more is synthetic oil really giving you?
That being said, I do use synthetic oil on my Lexus and my Honda S2000. Primarily so that I can use a longer oil change interval, but also for a bit of that placebo effect thinking that the tight tolerances of the S2000 will do better with synthetic.
But, when it comes down to it, that is all you really get from synthetic oil......an oil that can last longer and offer longer oil change intervals. If you don't run a synthetic for a longer oil change interval, it is a waste of money in my opinion.
I realize I may get flamed, and that many of you will post up your links to test results, most of which come from your favorite oil's marketing department. But all those "tests" aside, answer me this: how many of you are aware of any vehicle engine that has had proper oil changes and other maintenance, and has broken down, and it can be proven that it is a particular brand of oil that has caused it? I see many posts suggesting that some oils are magic elixirs, and that others are poison for your engines. However, I am not aware of any engine that has received proper oil/filter changes and other maintenance, and has crapped out due to a particular brand of oil, whether it is WalMart house brand, Pennzoil, Mobil 1, Amsoil, Castrol, or whatever.
Just my "not married to any brand" 2 cents.......