Castrol EDGE 5W-30 Advanced Full Synthetic vs. Quaker State 5W30 Ultimate Durability Full Synthetic

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Hmm I don’t see that sort of value on there, which one is it?

How come you changed your user name?
That previous use name was given to me by default because I didn't pay attention and I didn't like it so I changed it.
 
I've used Castrol Edge 5w-40 straight for 2 years to see how well it does under city and rough driving. It performs well, it has a decent detergent package, and contains titanium oxide I think to help bring the friction coefficient down. 5w30 Edge doesn't shear all too much , i've tested this with air cooled engines during the summertime here in the south, while when I used Mobil 1 5w30 and 5w20 because it was cheap, it sheared down and almost destroyed my air cooled engines somehow after 30 minutes.

Castrol makes decent oils, I prefer their conventional over synthetics for my engines. The synthetics are very high quality oils although. So yes, I'd go with Castrol 5w30 (and i'm a person to use 15w40, straight grade, or 20w50 only in all of my cars) that's how confident I am with this synthetic.
 
I’m a Castrol fan so I say Castrol but I’ll run anything that’s name brand and preferably conventional but synthetic will do for modern stuff.
 
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