ive seen alot of threads some saying royal purple sucks and i shouldnt use it and some sayingg= its some good **** overall should i just run it back to factory?

 

i use royal purple now and honestly i don't really notice a difference at all from this and mobile 1 and i used mobile one for a year and a half

 

you wont notice a difference, but it is a higher class oil...i prefer mobil1 or royal purple...but if i had to pick, it would be mobil...or amsoil

 

I wouldnt run either of them. You arent going to notice anything for a while. But when you start to put miles on it, it will start to run down a bit. Royal purple is worse then mobil one. But i still wouldnt use either of them.

 

just use what GM tells u to use.

 

ditto

 

I have always run royal purple and have never had a problem.

 

FTW

 

Mobil 1 is what you should use.^^^I hope your kidding. Mobil 1 is better than shitty castrol oil.

 

This is a really good oil. Use this or mobil one.

 

You obviously have no idea what you're talking about. Castrol 0w-30, aka German Castrol, is much better than any street app Mobil oil short of EP....not to say that they're not good oils too, though...

It is a TRUE synthetic...