Mobil1 vs Royal Purple

[ponyboy66]

If AMSOIL is the best why isn't it API certified? Just curious. I have spoke to Mobil engineers and they do conceed that AMSOIL is probably the best second to M1 that is out there. My dime goes into the M1.
Here is an independant study that is currently being conducted.

http://neptune.spacebears.com/cars/stories/oil-life.html

 

[Red mustang Gt 46]

If your car is used as a daily driver...(as you state) any quality oil is fine. I use Castrol GTX in my family rides and Mobil 1 in the Stang...

 

[crew_dawg16]

I've accidentally over revved my Stang up to 7500 rpm's twice. (Sometimes when I'm racing on the 3-4th shift it will not go into 4th gear for some reason without several tries.) But honestly if it wasn't for the RP then I might have lost a valve or two or even an engine.

That's like saying "If I didn't drink Evian bottled water, I might have died." It doesn't matter what type of oil you use when it comes to over-revving a couple times, as long as you don't hold it there.

 

[FiveO]

my question is...where can i get royal purple? do i have to order it online, because i've never seen it in any autoparts store?

 

[40th GT]

my question is...where can i get royal purple? do i have to order it online, because i've never seen it in any autoparts store?

Napa stores?

 

[StangLou]

Mobil 1 full syn in mine