This website tells you the different’s in oil you need to fill with a 2 stroke and a 4 stroke dirt bike. It turns out you need to fill a 4 stroke dirt bike more than a 2 stroke because the motor is not as strong and big as a 4 stroke. This website also tells me how much and frequent you have to fill a 2 stroke and a 4 stroke. I think this will help me if I test how long each dirt bike will last with a full oil tank on both motors.