T4 is the newer replacement for rotella T... The "T4" blended oil product ( part syn and part reg oil) new name,,, and to helps it line up with the synthetic "T6" (fully synthetic) name.... But I suspect even the T6 is a blend of synthetic oils. T6 oils would be more important if you operate in extremely cold weather or outside "normal design" environments. I personally dont do snow removal, or plant/plow/hay below 32 degrees, so T4 is fine for my 32 to 120 degree days.
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Today's Featured Article - Women and Tractors - More Views From the Farmer's Wife - by Teri Burkholder. The top ten reasons why the judges wouldn't let you participate in the stock antique tractor pull: Hey, this is stock! It came with that V8 in it! That "R" on my tires stands for "really old" not radial! Blue gas? We thought it was a pretty color! What wire hooked to my throttle?
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