my formula for Vlv Durablend:
3qts conventional, 1 qt synpower = durablend.
Nexgen Maxlife is $10 more at AZ and $15 more at o'reillys. I don't care about price matching. I shouldn't have to.. it's a hassle and tome embarassing.
I'm using Nexgen Maxlife in my 92 Taurus. dunno if it's good or bad right now, only have 500miles on it so far.