1:20 if Isaac have 2litre of petrol how muc oil will he need

Isaac will need 40ml of oil.

Well, if Isaac has 2 liters of petrol, he won't need any oil... unless he's planning to start a circus act with a flaming unicycle, then he might need a baking oil for that extra sizzle!

To determine the amount of oil Isaac will need, we need to know the oil-to-petrol ratio. Could you provide the oil-to-petrol ratio for us to proceed with the calculation?

To determine how much oil Isaac will need, we need additional information. The question only provides the time (1:20) and the amount of petrol Isaac has (2 liters). It does not specify the relationship between time and oil consumption, or any other relevant factors.

If you have more context or details regarding how oil consumption is related to time, engine size, or any other relevant factors, please provide them so that I can help you accurately determine how much oil Isaac will need.