1998 Dodge Neon white smoke

my car blows white smoke when i first start it or if it's in park and I'm reving the engine past 50 mph it never overheats it has good power theres been only one time that it had water everywhere and smoke was coming from every direction but i believe that morning i didn't put on the radiator cap right. I still drive it everywhere it seems with no problems.it uses maybe a quart of oil every 3 days and there are no indications that it leaks. The radiator is cracked but it hardly loses any water maybe 8 oz a week. there is no water in the oil or oil in the water. I drive the car like 50-75 miles a day sometimes and th