Every fleet owner should know the basics about the viscosity of the lubricants they are using and why the viscosity matters. Fleets—especially mixed ones—require a variety of lubricants. This ranges ...

Joe writes: Hi Sajeev, I’m sure this has been asked many times, but I was thinking about oil viscosity recommendations vs. what’s really best for your car. In the old days, which for me are the 1970s ...