My dumb uncle by mistake put the transmission oil in the motor oil and the motor oil in the transmission, will that fuq up the car??

well make sure he flushes the transmission and engine out. plus side is that the engine is being cleaned by the trans fluid, but it can dry out the seals.

yea don't let him drive that ****, wrong sub area haha. someone move this to general atuo discussion.
don't drive it, flush it out. refill with right fluids

ok thanks