I will definitely be replacing everything behind the timing cover, only want to do this once. I drained a majority of the contaminated fluid, let it drain for about an hour. Filled.with fresh oil. Did not add coolant, -2 celcius so was not worried about it overheating running for a few min. Wanted  to start the car to see if it was hammering or knocking. That would be the deciding factor as to whether or not I fix or sell.  Sounded good so as soon as I finish the front hubs on the Mazda, into the garage it goes.

mine is 2009, WP failed at 115k, coolant is clean(green) - I think nobody changed since 2009. I'm thinking should I change it if everything's fine?

Welcome.   Could you post a photo of the oil cap you're referring to.   It would be best to take a look and confirm where the leak is coming from.

You are kidding - The Peanut Butter Conspiracy? According to Wikipedia, the Peanut Butter Conspiracy was an American, Los Angeles-based, psychedelic pop/rock group from the 1960s. The band is known for lead singer Barbara Robison and for briefly having Spencer Dryden of Jefferson Airplane as a band member. The album's producer brought in studio musicians including Glen Campbell (yes that Glen Campbell) to bolster the group's sound. 

Find yourself a new mechanic. Nobody recommends replacing your oil cap every time your oil is changed. It is sad that there still are unscrupulous mechanics taking advantage of women.

I'm going to assume they mean the plastic drain plug in the oil pan. I've had my same one since 2019, but they also do leak I hear. If they're talking the oil cap (the part where you fill the oil from) there is an o-ring on there and it's the only thing that would leak, but I don't think it would be enough to leak on the driveway so it's probably not that.    It looks like there is an updated design of the drain plug:        

When getting my oil changed on my 2022 Edge, the technician said that the oil cap must be replaced every time to ensure a good seal. I’ve been told this at two different shops. The second one replaced the same cap, but advised that I should get a new cap at the next oil change. I’ve noticed a bit of oil has leaked on to my driveway. My question is, does the cap actually need to be replaced at every oil change? 

Purchased my first Edge.  Got a one owner 2015 SEL 3.5 with 23,000 original miles.  Believe it or not it’s had 9 oil changes!  

Welcome.   Sure gets good reviews - Amazon.com: XTOOL D7 Bidirectional OBD2 Scanner: 2025 Scan Tool with ECU Coding, Full System Car Scanner Diagnostic Tool, 36+ Resets, Injector Coding, Throttle Relearn, Crank Sensor Relearn, FCA, CANFD & DoIP : Automotive   I haven't tried it but expect the free Forscan app should have that capability.   Please add the details you have in your profile to your signature - Settings - Ford Edge Forum   .

I just purchased a 2015 Ford Edge SEL with 24,000 original miles.  Had all the information I could have asked for except the keyless door code.  After standing on my head trying to find it under the dash, I remembered my Xtools scan tool.  Sure enough, about five minutes later I found the code in the BCM folder.  I really like my Xtools.