Originally Posted By: mikeh1959
who has the best protection in synth oil
Really it all depends on what you are going to ask of the oil. Is it for light duty in a small 4 cyl econo box, heavy duty tow use, or maybe some real abuse in a hot rod or muscle car with a 400-500HP+ V8? Do you see extreme cold winter temps( I would say yes if you live in NJ )or extreme summer heat? Tons of factors play into "best" choices. A little more info would help us to direct you to some good options for your application.
In general most synthetics are pretty darn good. For the average person the name brand well know synthetics will do the job well for you at a reasonable cost. There are some truly premium/top of the line synthetics( referred to as Boutique oils on this site )that cost a lot more but are superior products capable of much longer service life. Unfortunately, there is no one BEST synthetic oil in a blanket application. They all have their + and -.
For most people these are some very good choices...
Kendall GT1( 76 Lubricants full synthetic is the same stuff )
Valvoline Synpower
Penzoil Platinum
Quaker State( name changes so often it is hard to keep up current = Ultimate Durability )
Castrol Syntec or Edge
Mobil 1 & Mobil 1 EP
Amsoil XL( harder to get and more $$$ )
All of them are relatively easy to find and can be purchased either in bulk containers( 5 qt jugs )or on sale for $4-$5 a qt or even less. All are good for 5K-7500 miles of use and some even up to 10K in service life( Mobil 1 EP claims 15K )with a quality filter. For "most" people/situations these oils will do the job.
If you want to step up to a top of the line "Premium" oil and/or extend those oil change intervals out from 10K to 15K+, or you have some real heavy duty use required of your oil, then you are looking at the following oils. Much more expensive and harder to come by for the most part but better products...
Royal Purple
Redline
Schaeffers
Amsoil( regular and SSO )
These are not all of the oils out there available to you but they are the most common and well known. ANY of the ones listed above in either list is a good choice. To narrow it down your application and goals would help.
Hope this helps and welcome to the site. Ignore the folks with permanent grumpiness. Doesn't matter if you are a newbie or a veteran they will find something you post to complain about.