What isthediference 30weightandtwostrokeoil?

Answer 1

If I spaced your words out correctly you are asking "What is the difference between 30 weight and 2-stroke oil?".

All oil unless synthetic comes from crude oil. Crude oil is then refined into many things we use today such as different fuels, lighter lubricating oils, and heavier oils like grease.

As far as the differences go between the 2 you asked about. They are both designed to lubricate internal combustion engines. Just because they lubricate these engines, they lubricate 2 wildly different types of engines.

A two stroke engine has no crankcase oil to lubricate its internal components. 2-Stroke oil is designed to "mix" easily with gasoline to act as a carrier. The oil is "diluted" into the gasoline and sent into the engine via the carburetor. From there into the lower portion of the crankcase and gets splashed around in the crankcase and leaving some of the oil behind on the rotating parts. It then can lubricate any rotating parts. Some of it inherently goes to the combustion chamber and gets burned with the gasoline.

In a 4 stroke engine where the 30 weight oil would be used has a "sealed" crankcase that holds the oil for lubrication. It is thicker and has a higher viscosity because it is not designed to be diluted.