Engine knock and oil light coming on in a 2011 Kia forte

My Car engine started knocking but
it is not a continuous knock it is
worse when it is first started and
doesn't seem to knock when driving
down the road unless I tramp down
on the gas or let off fast. The check
engine light came on today and the
oil light is sometimes coming on
when the car is sitting at an idle. Any
ideas what this might be. There are
approx 95000kms on the car