Next day after oil change proceed to go up 400 north. Lotsa traffic but it was generally flowing at 100km speed limit.
Out of no where (while in the middle of no where approaching Barrie... think big empty corn field in pitch black darkeness) I start getting what I think is rain on windshield. Odd as no rain on forecast and dry all around me. Use wipers and "rain" is smudging all over windshield... well turns out it was oil. 5 seconds later engine light comes and then 5 seconds after that I hear a big pop followed by sound of marbles in a can. Managed to get from far left lane to right shoulder. Pop hood and the engine block is glowing red with a huge hole blown out of it. Look under car... no bolt in the oil drain plug!!!
Had it towed way back to toronto Canadian Tire were oil service was performed. Advised tow driver to leave it there with door unlooked and key under visor. Hitch hiked to wasaga with friends... thanks to the nice guy in the Van who picked us up and drove us all to nearest rest stop. My bro picked us up from there. Called crappy next morning and told them what happened and where to find car.
Short story, they assessed the car and deducted that their oil change monkey either didn't tighten oil drain plug to spec or did not install paper washer as required. Canadian tire agreed to foot bill for an engine replacement at an independent shop. This was like 20 years ago. Think it was like $2000 all in for tow reimbursement, engine swap, and detail job to clean all oil over spray + a $250 gift card for my troubles. I was young and stupid and took the deal no questions asked. Car was repaired great, ran like new after repairs until the day I traded it in.
Moral of story. Stay the heck away from Crappy tire service centers.