FWIW - My T-bird Turbo Coupe used to blacken the oil, even synthetic, before the rebuild, after the rebuild, within a few hundred miles of of every oil change.


Jonathan


1991 Montero LS 3.0 5-Spd LWB 31" Bridgestone Dueller ATs on stock rims, tan/tan interior/exterior
1986 Isuzu Trooper 2.3 5-spd - partially disassembled, tan interior/dark blue exterior