I've searched for info in regards to "supertech synthetic oil", I was wondering if anyone has tried the supertech synthetic blend 10W-30, I know that it isn't a true synthetic, but it claims to perform better than any dino oil (on the bottle) and it's $1.63 a quart at the local Wallmart (cheaper than some of the conventional oils) If it's a blend then I'm assuming that at least 90% of the oil is regular supertech oil and about 10% supertech synthetic? Thoughts?