2005 Chrysler PT Cruiser Owner's Manual - Page 270

270 MAINTAINING YOUR VEHICLE The best time to check the engine oil level is about 5 minutes after a fully warmed engine is shut off or before starting the engine after it has sat overnight. dipstick. Adding one quart of oil when the reading is at the MIN mark will result in a MAX reading on these engines. CAUTION! Overfilling the crankcase as indicated by an oil level above the "Max" mark on the engine oil dipstick will cause oil aeration, which can lead to loss of oil pressure and an increase in oil temperature. This could damage your engine. Change Engine Oil Road conditions and your kind of driving affects the interval at which your oil should be changed. Check the following list to decide if any apply to you. • Day and night temperatures are below 32°F (0°C). • Stop and Go driving. Engine Oil Dipstick Checking the oil while the vehicle is on level ground, will improve the accuracy of the oil level readings. Maintain the oil level between the MIN and MAX markings on the