These engine parts are from a teardown of an engine using an experimental low-HTHS viscosity oil. A visual inspection shows no noticeable differences in wear between it and the higher-viscosity oil.

Viscosity is one of the most fundamental physical properties used to describe how materials flow. It governs the movement of liquids, molten rocks and even slowly deforming regions deep inside the ...

Crude oil derives, by way of geological processing, from organic material initially buried in sediments at the bottom of ancient lakes and oceans. Crude oil formed at depth in a sedimentary basin ...