In the winter, when a decent 5w-30 should replace the 10w-30 for year round use? In some cases, I can see someone (an informed person) picking 10w-30 if it had a few ticks more viscosity or a touch higher HT/HS over a 5w-30 in their favorite brand, but for the majority of people, a 5w-30 should due just fine. I suppose there also are a few applications that would favor a 10w for the sake of shear stability too.
It would seem that today's technology and resources have made a 5w just as durable as a 10w, so I would think that people would benefit from the increased flow and pump-ability and teeny increase in fuel economy when the oil isn't at operating temp.
Am I off base? I ask not only for my own sake, but to also levy a more convincing argument on the benefits of 5w in place of 10w when discussing with the boss or customers.
It would seem that today's technology and resources have made a 5w just as durable as a 10w, so I would think that people would benefit from the increased flow and pump-ability and teeny increase in fuel economy when the oil isn't at operating temp.
Am I off base? I ask not only for my own sake, but to also levy a more convincing argument on the benefits of 5w in place of 10w when discussing with the boss or customers.