1991 Metric or SAE Oil Filter Thread?
I'm finally getting around to doing the tuneup on my wrangler. I'm finding in speaking with both Autozone and Advanced that the 1991 had both an SAE and Metric Oil Filter option. I don't know which one I need. Any way of telling without pulling the existing filter and matching it up?
Denis A. Baldwin
1991 YJ 99 Vortec 5.7L, SM465, NP205, 14 Bolt Rear, Dana 60 Front, 5.13 Gears, Detroit Lockers, 395/85R20 46" Michelin XML tires on 20" XD Wheels, Cherokee Offset Springs (10" front to back stretch total), Bilstein 5150s, 1in. BL, custom cage, Warn M8000, Double D Dash/OHC, 4Low Front Stinger Bumper, DirtWorx Rear Bumper WTC, Tube Fenders, Comp Cut, 1 Ton HD Kingpin High Steering and PAID FOR.