Want this question answered?
Yes, as long as the ambient temperature is above fifty degrees.
Yes
Yes, you can mix weights but use exactly what the manufacture recommends and do not mix weights.
not recommended
There should be no problem with mixing them.
Yes of course you can mix them what what would be the reason to do so.
No worries. If 10w30 was suited for your current climate then your new mixture will do just fine. If you needed to use 5w30 because the temps are still below zero in your area, then you may want to change to entirely 5w30. I remember hearing about people with LS1's in their Camaros mixing 4 qts of Mobil 1 10w30 and 2 qts of 15w50 in order to achieve a mix that was similar to a 10w40.
Nothing if they were approved oils. You can mix 10w30 with 5w20 etc. Not a good idea but you can do it. You can mix brands with no problem.
what happens when radiation mix's with electricity
The brand isn't really all that important. What's important are the specifications. Any major brand (Mobil, Pennzoil, Valvoline, Quaker State, etc.) should be fine, as long as it meets or exceeds the SAE criteria (these will probably be marked on the oil fill cap). I've heard that it's not a good idea to mix brands, e.g. if you filled it with Pennzoil, top it off with Pennzoil. I don't know how true this is, but it makes some sense, since the additives may be different between brands and not mix well.
what happens when you mix vinegar and baking soda
what happens