Hey fellas, I recently picked up a 2004 SE. Not knowing the last time the oil was changed and after a bit of research here on the forum, I decided to go with the Rotella T 15 40. After a 20mi drive, I noticed a lot of lifter tick, then at a stop light the oil indicator started flashing. Has anyone got any ideas? Is this normal for Discoveries? The only thing that I did was a basic oil change, with a wix filter. Thanks for any input.