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For my Jeep 4.0 (tractor engine) on sale at Napa for $13.69. The containers are different, but same part number and specs per label except the SP, so one is older. Like seeing the flag on the label. Hoping this gives me a good intro to HDEO for the 4.0, and maybe I'll switch to this from others...

Well, I'm posting my first one here. I've got this mower with an 1985 Onan B43G engine. I've owned this 9 years (about 1400 hours on it), and always used 30W only in It-usually JD Torq Guard or Pennzoil. After getting more interested in researching oils for my F150 4.6L and Jeep Wrangler 4.0...