When I apprenticed for an old Italian guy in 72 he called it horse grease. Said it was made from horses IDK. We had a 20 gallon bucket full and used it on everything,that was some sticky stinky stringy stuff. Made by Gulf IIRC.

1968 Bronze Metalic Road Runner
!967 Malibu Wagon Original 4sd w/air
2001 Dodge Ram 4wd
1985 GMC K1500 4in lift
1993 Honda Civic W 350k Beater
2003 Honda VTX 1800 Bagger