Fwd: Re: [Vwdiesel] about that oil - again

[Dana Morphew]

I think I recall there are some multi-vis synth oils that don't need
"improvers".  Those that do don't require as much to get the wanted effect.

-Dana-

Sandy Cameron wrote:
>
> QUESTION
> Are wide spreads in synth oils done the same way? (with long chain aditives)
>


> >Viscosity improvers aren't good lubricators.  They replace oil molecules
> and are
> >used to attain the "viscosity spread" in a multi-viscosity oil, so a "big
> >spread" oil like 10w40 (one of the worst offenders) has more viscosity
> improving
> >molecules and less lubricating molecules than a 15w40 oil.