Zinc oil supplement
A lot more can be learned studying the chart. One thing is how close the different grades are at 100°C. To really understand that, it helps to know how the testing is done. But you can get an idea just looking at the viscosity numbers.
This is also a favorite graphic. It shows that despite the vast difference in viscosity in grades at cold temperature, when hot they are much closer.
This chart was a favorite of mine. I mostly used it to show people that just because the number is higher for SAE grades of gear oil, they aren't thicker than the lower numbered motor oils. The higher numbers starting back then at 75W were chosen so folks would know it's a gear oil. The chart has been updated since then to show 0W, 5W, 8 & 60 grades of motor oil, and gear oils 250 and lighter than 75W. I forgot what those lighter ones are.
A lot more can be learned studying the chart. One thing is how close the different grades are at 100°C. To really understand that, it helps to know how the testing is done. But you can get an idea just looking at the viscosity numbers.
This is also a favorite graphic. It shows that despite the vast difference in viscosity in grades at cold temperature, when hot they are much closer.