try using a thinner oil 5w30 or 10w30.
its just the lifters not holding pressure.
my truck started to do that after i put in 20w50.
another cause is being a little low in oil.


96 SPORTAGE 4 DOOR:1 3/8 body lift:eibach springs & spacers:15x8 rockcrawlers & 31x11.50 super swampers:warn hubs:winch bumper http://www.cardomain.com/ride/2115301