oilleak

A certain amount of oil will blow out of the dipstick if it is not fully pressed down the crankshaft spins around at thousands of revolutions per minute. Are there other engine oil leaks as well. If an engine is "tired" the piston rings don't seal and you get what is called "blow bye" compression leaks past the piston rings causing crankcase pressure forcing oil out.

too much oil or this engine has too much compression going past the piston rings this is common when this engine get about 150k miles on it might try thicker oil like 20/50 this may help Good Luck Tom