add oil to what, not told?
no maker or model told , impossible answer lacking ESP
never put oil in a 4stroke engines gasoline tank.
never over oil a 2 stroke, if tells 50:1 do so and win. not more. 50 parts gas to 1 part oil
or buy fuel from walmart called premixed 2 stroke gas.
no washer told of vast ,zero.
Check all ends of your power wand. there should be a little filter and if it gets plugged the motor will shut down. Check both ends of your wand. The sprayer end should come off and mine has a filter if you take the sprayer end off.