I bought the Amana 18 cu. " in 1984. It's been a good
'fridge.

Lately it makes a sort-of growling noise when the
compressor runs, kinda like:

"grrROWLgrrROWLgrrROWLgrrROWLgrrROWL ..."

varying in intensity from second to second, but in
a regular fashion.

I checked the fins/tubing underneath: a little dirty,
but not clogged up at all.

Sound like the compressor going south? This'd be
an R12 system?

It's 22 years old. Can one nurse say 30 years
outa such a unit?

TIA,
Puddin'