Originally Posted By: Brule
Both use hydrowax/hydrocracked base stocks, and they make no claim otherwise. Flip a coin. Higher TBN, better additives, or certifications may lead you to what's "best".
Good points, then check the UOA section and look for your engine using Edge vs. Mobil 1. Hopefully you'll find some, then run a few of your own. Honestly establishing what's best for your engine is going to take a while, and what you will most likely discover is there is no best.
Honestly, I'd make it easy, and go for the oil with the best price. At least going that route you'll save money over the life of the car since you'll probably never notice a difference in engine life. JMO