This video shows you how to change the engine oil in your Briggs & Stratton engine. All you need is a floor mat, oil drain pan and a plastic bag. Insert the plastic bag under your cap to prevent fuel spillage. Remove the dipstick. Tip the mower on its side, away from from the side with the carburettor. Drain the oil through the oil filler tube. Remember to only use SAE 30 oil. You should change you engine oil once a year or every 50 hours.