How much oil in 5 litres for a 501 ratio?

To find the amount of oil needed for a 501 ratio in 5 liters of fuel, you divide the total volume by the ratio. In this case, 5 liters divided by 501 equals approximately 0.00998 liters of oil, which is about 10 milliliters. Thus, you would need roughly 10 milliliters of oil for 5 liters of fuel to achieve a 501 ratio.