i just go by what the fordtechmakuloco guy said to do... i dropped the pan, cleaned it all up, new filter, made sure the original one wasn't there.... i didn't take that cap off, actually i admit i didn't even notice it, was concentrating on following the directions, so not sure if it looks like the manual diagrams with a recessed bolt underneath... would be nice if someone could do a 'powderpuff' maintenance thing for chickies like me (hint hint - i can flutter my eyelashes if it will help)... don't have a husband or brothers or father so i rely on the internet and kind folk like yourselves... and my maintenance manuals. i DID rip the whole truck apart maybe 9 years ago, trying to figure out why the radio wouldn't shut off when i opened the door... but the automatic locks didn't work either, nor did the auto headlights - seemingly unrelated things which turned out to be related by a purple wire that turns around the entire vehicle... so have a working knowledge of the electronics - actually probably have an advantage, i'm small enough i could just about fit under the passenger side when it came time to rip it's little brain box out (which wasn't the problem, so had to take THAT one out and put the original back in)... i like doing this kind of stuff, just need some guidance on what i should be doing. my girl has over 230,000km on her, and i'd like her to last a few more.