NGK 6418 in my 2008 S60 2.5T

Several years ago I was having constant issues with headlight bulbs. I think I replaced the bulb socket (maybe with a ceramic?) and things have been good ever since.

P2 banjo bolt is like the final boss. Finally beat him, don't want to face him again.

Put a BailCast split boot from Amazon on a 2002 Honda CRV one year ago. $21.49
Not a long-term fix, but on an older vehicle where you're not wanting to make major investments it has it's purpose.
Holding up fine, but keeping my eye on it.

QUICK UPDATE

Still running strong, despite periodic P0101 recurring every few days. Instead of immediately clearing it, I've just ignored it and eventually it goes away. Then comes back, then goes away. As long as the car runs smoothly, I'm just ignoring it and maybe the computer will find some way ...

IMHO...save your $$$. That said, I am extremely loyal to the P2 with my 2008 S60 2.5T at 260k miles. I will be sad when she leaves me. Not looking forward to finding a replacement. Have been on CarGurus autosearch for a 2005-2008 S60 T5 in the midwest for several years just in case. Have never seen ...

Most important is a fresh coat of brightly colored paint.

Well, not sure what else to do at this point. P0101 comes back almost daily. Runs OK even when the code pops up, so maybe I just need to live with it. And clear the code when I get tired of seeing it. Ordered a new Bosch MAF as a last resort.

Nailed it. This is right about what I guessed. Could have been much worse, so congrats on that

Just did this with the blue stuff from Advance. I forget the brand but it was for "european" cars...volvo, bmv, etc.
I drained it out the bottom of the radiator. Probably put about 6-7 qts back in.