Oil light on 2008 Sebring Convert with Flex fuel

Engine MIL went on, was P 0201. Changed & ran
great (3mpg better) then P 0201 AGAIN.  Changed
& worked again. Wasnt driving car as I had vacay
but started it daily & ran it for about 5mins to keep
fluids moving & battery charged. One day started
making LOUD ticking noise & oil lamp came on.
Checked level, was good. Was Xmas time so left
for following month to take to dealer. He kept it a
MONTH but said my car was fine after a week but I
told him to recheck. After 2 more weeks he said I
had P 0201, backfire & oil lamp but no ticking
noise. Week later went in to see svc mgr &
mechanic. They changed out injector (P 0201) &
changed oil. Got ticking noise to start but was
random. Finally said car was "ok" so I picked it up &
1mi down the road oil lamp comes on. More
driving later & I get 6 "chimes" & oil lamp with
LOUD ticking noise. Soubds like engine with no oil
& increases with engine rpm (reminds me of
playing card in bike spokes). Any ideas? Going
back to dealer on Monday.