Make sure that it's fully warm (hot?) when you use it. After that, I would change it twice a year. That's what I do for my '48 with its 1500-2000 miles per year.
It's a seasonal thing for me. In the Fall and in the Spring.
It also lets you get under your truck, look around and smile. It's such a peaceful experience for me, I could take a nap under my 3/4-ton....laying curled up on my side!
Last edited by Wally / Montana; 05/27/2011 1:39 AM.
1948 3/4-Ton 5-Window Flatbed Chevrolet 34 Years. Now with a '61 261, 848 head, Rochester Monojet carb, SM420 4-speed, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.