911!!!chrysler sebring P0300 code and valve sound!!!

[The_last_regulator]

Hey everyone!!! Hope everyone is doing good...
My friend has a 2004 sebring 3.0V6 with 105k...It has set for sometime(2mths) he started driving it again about a moth ago....His check engine light came on and asked me to help!!!! SOOO heres what I did
I pulled the code and found P0300 random multi misfire...
It was a pain but I changed the plugs and wires and the UPPER plenum gasket...
Started the car up and it did fine....until i drove it a few miles and found some problems!!! As I was pulling in to a parking lot the OIL LIGHT came on!!!
I added about a 1/2 a qrt....
The light went away!!!
I got on the high way and about 60mph the light came on again!!!!
I shut the engine down and started it back up and it was making a VALVE CLICKING sound but the light was gone.....I drove the car home about 40 or 45 the whole way and the light stayed off......

I made it home with no more problems but while I was setting in the drive way the check engine light came on (ONCE AGAIN CODE p0300) I THINK AS SOON AS I TURNED THE HEATER TO HIGH(At least that's when I noticed the light)

My friend says-It needs the oil changed....So that could be why Im hearing the sound but why did it start after driving it for a bit????But the oil light has me freaked out....Its only comes on at high speeds or fast take off???It idled for almost 45mins in the drive way and never had a single problem....

Also any ideas what I should check next on this code???????

Thanks God bless!!!!

[danielsatur]

If the oil light comes on, it's probably short 3-quarts.
The hydraulic lifters might be sticking, Change oil ASAP.

[Jenny rose]

Well as for the oil light, if the oil is full and the light flickers at a stop light it would be the oil (unsure of name) sender attached at the oil filter. it is typical for them to crack or leak into the plug that connects it. It may need replacing but an easy fix.