MIxing differant weight oils

yes, weight refers to viscosity, not actual weight. kind of like gauge in metal refers to thickness, while gauge in guns mean size of bore.

Yes you can. Mobile-1 had this in the FAQ on their site at one point. It averages out exactly as you'd expect. Can't guarantee results if mixing brands of oil, but I wouldn't sweat it.

down home wrote:
No. The heavier oil will sink to bottom. Once it is running it mixes well.
Mixing different weight oils to get a certain weight doesn't work.
I would have to think on it a bit to give a thorough answer. It's been a while.
Someone els her knows how it works.

Calling the oil "heavier" isn't really correct since the "weight" is actually referring to viscosity and not actual poundage. The oil will mix fine.

No. The heavier oil will sink to bottom. Once it is running it mixes well.
Mixing different weight oils to get a certain weight doesn't work.
I would have to think on it a bit to give a thorough answer. It's been a while.
Someone els her knows how it works.

Close enough. Use it up.

It's certainly possible, but why does it matter. Either one is close enough, unless you're using it for rocket fuel, then it might be rocket science. :)

Seriously I can't imagine any application that 5 numerical points difference in viscosity will make any difference.

Math works. Same brands etc. Chances are you might have it