After my 1023e has not been operated for a extended period of time it takes about 3-4 seconds for the oil pressure warning light to go out on start up, and the engine does 'rattle' letting me know that it is thirsty for oil. That being said if the machine is used daily or every other day it seems to be fine, is this considered normal? Does the engine oil filter have anti drain back? I'm using 5w40 Rotella. .