Re: Dino juice/Synthetic Lg Viscosity Ranges:good or bad?

["Psychos 'R Us" <honge@creighton.edu>]

On Thu, 28 Sep 1995, gkaufman wrote:

> I've heard that a wide viscousity range can cause coking problems and that
> you should use a viscosity index with the narrowest possible range for your
> climate.  Can anyone verify this?  Thx.  glenn

For dino juice, this would be definitely correct as dino juice uses 
viscosity improvers to extend the viscosity range. But the thing is that 
these improvers will break down in time and usage.

For synthetics, the natural viscosity range is a lot wider than dino 
juice. As such, synth oils use a lot less improvers (or none at all?) 
than compared to dino juice.

By the way, for dino juice, a 5W-30 will use more viscosity improvers 
than a 10w-40 for example. The lower the number you dip into, the more 
viscosity improver it has.

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