Hi guys, this is a bit redundant, I know there was just a thread on this, but seeing how Syntec isnt terribly popular on here, its hard to find a lof of UOA's and oppinions. The reason I'm asking, is the local Costco has syntec cases of 12 for $48 in Canadian dollars. this is by far the cheapest you can find synthetic locally. Its FAR cheaper than I was paying for Amsoil XL. Anybody using it mind chiming in? Its going in my wifes mazda 3 for probably 4-5K mile runs. I cant find any info on TBN for their 5w20, but I know its slightly thicker than Mobil 1 5w20. any thoughts, to make me feel better before I buy a Costco sized supply? LOL.