Remember Detroit Diesels? Not the Roger Penske 4 stroke, the original 2 stroke series 53, 71, 92, 169 with roots blowers?
Straight 40 summer, straight 30 winter.
Their cheap slipper bushings on their wrist pins would leak out any lighter weight oil excessively. I'd never seen a half bearing wrist pin before! All the iron mines up here used 16V169's because they were the lowest cost per ton of ore produced - even with all their repairs and short life!! The Empire Mine Maintenance Supe told me when I was with Mobil Oil.
I remember these well!
I still see these on generator units here in Ontario.
Bell Canada had some sort of deal with Detroit Diesel back in the day as the majority of their buildings had them, and some still do to this day.
DD still makes full rebuild kits for these engines to this day. Mostly to support the US Military, from what I was told back then.
I recall being at a site where we were doing an annual service with full load test on a 16V92 unit and it went into mexican overdrive and started running away.
I damn near crapped my pants when he screamed to me to run out of the room when they started going into to overdrive.
I also recall a time when we were servicing a DDCMTU Series 2000 unit and it threw a rod out of the side of the block, hit a block wall and took out a section of it with the flying debris.
Luckily no one was in the room at the time, we were all just outside the generator room monitoring it with the laptop.