Joined: Feb 20, 2007 Posts: 606 Location: Illinois
Posted: Thu Mar 24, 2016 7:20 am Post subject:
I live in snow country but I try to drive my M38 and M38A1 every chance I get year round (even tho I don't have tops for both or heaters). Not many miles accumulate per year but I change engine oil 1X per year, trans oil every 2 years, brake fluid every 2 years, coolant every 2 years and grease as needed. Breakdown of the fluids is not the concern, accumulation of dirt and water is. _________________ 1951 M38
Modern oils usually get to play in modern engines with computer controls for better engine management, cleaner operation and better temperature controls. None of these traits are possessed by your half century plus Willys 4 banger. In fact regular modern oils are not the best choice for your antique engine. There are several quality oils designed with the needs of old style engines in mind.
Oil gets dirty based on mileage and calendar time. 3000 miles (if driven hard), 6000 miles (if driven conservatively) or 12 months. Whichever comes first is the schedule to keep. _________________ Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
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