Between my old truck and my little hot rod, if they aren't leanking it's coz they're empty.
My old 270 is leaking oil from a couple small points I cant seem to track down, I did chase down a couple leaks here & there, but the rear end was the one that made me nuts. I ended up (on the 3rd try) using this sealant called "The Right Stuff" and it hasn't even seeped a drop since. Worth a look for things that dont need to come off with any regularity, but even so it cures soft so it's flexible and not too difficult to take apart.
1956 GMC 370 dump " 'Tater "1970 VW Volksrod "the Black Bomber"
2007 Chevy Avalanche
2020 Jeep Cherokee Trailhawk,
2005 Harley Davidson FLHTCUI
I dig all cars, old and new, whether they were hammered out of American iron, German steel, or Japanese tin cans. Being unable to appreciate them all is missing out on a world of great things.
But thats just MY opinion! :P