Huh, so do you think the paid courses actually teach you how to solve problems or just explain the theory better?

Respectfully @jamie_white, those fuel economy gains are real in controlled tests but they disappear fast depending on how you drive. Stop and go city driving with lots of idling burns through DEF and can eat into that 3-5% pretty quickly. I run a small fleet of work trucks and the savings only show up on long highway hauls, not around town. The DEF cost might be small but the fuel economy bump is inconsistent at best.

That hacksaw trick is about the only thing that works. Had to do the same on a BMX once.

You mention finding usernames you don't recognize, that's what got me too. I had one for a site called "Wrapbox" or something like that. No clue what it was. Did you actually go through and delete the ones you didn't need, or did you just leave them sitting there? Because I'm still on the fence about a few of mine where I can't even remember the password and the reset email goes to an old address I don't check anymore. Feels like digital hoarding at this point.

Bank's always digging up old shit right when you least need it.