What would be the best brand synthetic motor oil for a 2006 Ford Mustang GT (5w-20)?

I've heard Royal Purple is the best, any objections?What would be the best brand synthetic motor oil for a 2006 Ford Mustang GT (5w-20)?
Royal Purple isn't necessarily the best. As someone posted, Amsoil, Castrol Syntec, Mobil 1, or even the OEM Motorcraft Synthetic engine oil are all very good brands, as long as you use the proper 5W20 weight that is called for.What would be the best brand synthetic motor oil for a 2006 Ford Mustang GT (5w-20)?
Paying 5x times for oil will not make the engine any better. In reality, well-built engines last indefinitely with regular oil while garbage ones fall apart with synthetic. To make it simple: don't waste your money.
mobil 1 or royal purple
i own a repair shop,and royal purple is good but its not the best there is,the best one on the market right now is Mobil one 5-w-30 ,that has to be the best oil i have ever put in a vehicle in my life, i use it,and all my customers have switched over to it also,and i run around 8-10 thousand on an oil change and it still looks good,but they have the best blend for oil there is on the market right now,r-p is good but not that good,hope this helps,good luck with it.
Mobil 1, Catrol Syntec, Redline, Amsoil, Elf. all are good lubricants. check out www.bobistheoilguy.com for a lot of virgin oil analysis results on almost every oil made.
Almost all the oils exceed the specs set forth by the manufacturers. Which one is the best is almost as much personal preference as testing. But no one has said anything about the filter. The filter is as important as what kind of oil. If you are going to drive more than 3000 miles on your oil, get a good quality high capacity filter to keep the contaminants out of the oil. From the information I have seen, Amsoil has the best filter, with Wix being right up there. Wix makes filters for several different suppliers including NAPA. That would be the NAPA Gold filter. Don't go to walmart and get that $1.19 filter to save some money unless you will change oil at 3000 miles or less.


Also, stay with the 5w20 oil that Ford recommends. It will reduce your mileage and increase oil comsumption to change viscosity.
Forget it, Castrol Syntec Full Sythetic, Nothing else comes close.
Royal Purple without a doubt.