It is well known that synthetic lubricants offer much better protection in cold conditions compared to dino oils. But what if they have the same winter rating? If you have a 5w-30 synthetic oil and a 5w-30 dino oil, why is the dino oil allowed to be much more viscous at, say, 0 degrees F?
Is there just that much range within the winter ratings? Just like GC is a thick 30 weight and Edge is a thin 30 weight but they are both 30 weights?
I know cold pumping viscosity is more important to look at for a cold weather oil but since oil companies don't publish that on the bottle and it can sometimes be hard to find it online even, what do the winter ratings really tell you about an oil?
Is there just that much range within the winter ratings? Just like GC is a thick 30 weight and Edge is a thin 30 weight but they are both 30 weights?
I know cold pumping viscosity is more important to look at for a cold weather oil but since oil companies don't publish that on the bottle and it can sometimes be hard to find it online even, what do the winter ratings really tell you about an oil?