What is the oil gas mixture for a push lawn mower?

most new push mowers use just regular pump gas. if the engine has a place to check engine oil and has it own oil and filter it is a 4 stroke engine and does not require mix gas. A small engine that requires mix gas (2 stroke) it will be in a 1:25, 1:30, or 1:50 mix of oil and gas. most newer 2-stroke engines use a 1:50 MIX. Look on the fuel cap or see if it is stamped on the engine anywhere. You may need to contact a manufracture to be sure of the mix ratio.