I like that explanation on oil viscosity . Especially the part about oil shear of multi grade oils at high temp and what it does to the viscosity range. Good reason to have oil samples tested on heavy use engines that hold a lot of oil in the sump. Smaller engines, just dump it. One other thing, you can see how one particular 30 wt oil can be very close to the same viscosity as another 40wt oil if one is on the high side of viscosity range and other is on low. I think a lot of the multi-grade oils on the market fall into that category of just being over or under a line.
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Today's Featured Article - Harvestin Corn in Southern Wisconsin: The Early Years - by Pat Browning. In this area of Wisconsin, most crops are raised to support livestock production or dairy herds in various forms. Corn products were harvested for grain, and for ensilage (we always just called it 'silage'). Silo Filling Time On dairy farms back in the 30's and into the first half of the 40's, making of corn silage was done with horses pulling a corn binder producing tied bundles of fresh, sweet-smelling corn plants, nice green leaves with ear; the
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