Went to ormeu on the wkend had some fun in the mud, as soon as I got back on the road my oil light turned on...popped the bonnet open checked the dipstick it was half way. Got home topped I up and the light didn't go away. Been driving it all week oil is full yet the light is still on???? I got a gq single cab 4.2 with an aftermarket turbo. This happened to my Mavarick once but the light went away after some time. Any suggestions?