.7 L
I personally use 32:1 of amsoil and regular unleaded gas for my ktm 125 sx 2003.
yes . gas is made from oil..
No, you do not mix oil with the gas as it is a 4 stroke and has an oil resivoir.
you dont, drain the oil and start again
its a mix of 32-1 oil mix.
4 cycle means that you do not mix oil with the gas. They will have a place for the oil and a place for the gas seperate. Although, not many weedwackers have 4 cycle engines... 2 cycle engines are the ones that you need to mix oil with the gas.
Look on the oil container and the engine that you want to use it in. The engine will tell you what ratio to mix the oil and gas at. The container of oil will tell you what amount of gas should be mixed with it. I have found that the best way is to put the oil into an approved gas can and then add the gas to it. This helps to mix the oil better.
You do not mix gas and oil in a kawasaki kz 400 motorcycle.
Fuel /oil mix is 50:1
2.5 Ounces it say the mix rate on all 2 stoke oil containers. Add the oil then the gas to get a good mix.
You can find that info , as well as a lot more, here: http://motocross.transworld.net/2003/07/09/2004-ktm-125-sx-200-sx-250-sx-and-525-sx/