On the old Volvo cars the DOT 5 will eat away some brake parts. I would be suspicious about the same problem on most older vehicles. I have switched to Castrol GT LMA with no problems for over a year now.

Castrol LMA


http://www.leonmack.com/
'48 Chevy 1/2 ton
'66 Volvo 122S 2-door
'68 Volvo 220