[serialk11r]

Do let us know if you see a big difference.

I would only be okay trying out a drop in viscosity grade if I knew the oil temp. High performance cars that have 50 or 60 spec from the factory are supposed to run okay at 260F on the track where the oil has thinned down to around 11cSt, but you're not supposed to go much below that or the bearings take damage on some cars (cough BMW).

A car with way too much oil capacity or aggressive oil cooling might have trouble getting oil temp over 180F on the street, and 0w-16 would be at a perfectly fine viscosity of around 9 cSt there if the engine was originally supposed to take 20 or 30.

So rapid damage considered and avoided, the question becomes is it worth it. Supertech brand synthetic oil is what, 15 bucks a jug? Mobil 1 AFE 0w-16 is 23, and Mobil 1 is not really known for having good anti-wear properties AFAIK. If you get a 1% improvement in FE, you're looking at 800 bucks of gasoline before breaking even, and that's a LOT of miles, and risking more bearing wear at the same time.