From what I was taught, yes. Keep in mind this does have an effect on the
additives mixture. I would really recommend sticking with one brand per oil
change however.
yes you can mix oil brands. it is not recommended to do though. As long as the weight of the oil is the same.
Yes you can mix different brands but I recommend you do not mix different weights. You can even mix synthetic oil with conventional oil. But as the weight of the oil is critical, do not ever mix one weight of oil with another, no matter if it is synthetic or conventional oil.
Yes, as long as they both meet manufacturer specs, no issues.
It is a gas/oil mix motor, you don't change the oil.
NO. Do not ever do that - change out your oil, if you can, flush the system, and then put in new oil.
Yes, it is fine to mix brands.
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.
When mixing 2 stroke oil , the oil to gas ratio should be on the bottle . Different brands of oil mix different . But the bottle should tell you how much oil to gas to get the 32-1 mix that you want .
Yes, as long as they are both oil based or both water based.
Yes, you can even mix synthetic with conventional oil.
Oil changes are always necessary. If you mean can you mix conventional oil and synthetic, the answer is yes you can.
Oil and oil will mix.