Oil cooler upgrade for NA cars

[griz]

Burl Vibert wrote:

> Brendan/Coolian wrote:
> > My oil, if the gauge is to be believed, never gets above 130,
> > and that was tailing Huw at 110mph for 30 minutes. That reading
> > is barely halfway up the gauge.
>
> Well, 130C (266f) is too high for most oils, hope you're using
> synthetic at those temps.
> Maybe you need an oil cooler;-)

What temps are really too high and too low ?  Just as Brendan's car does
mine
doesn't get above 130C by the console LED meter and is halfway on the
inst. cluster.
 What the consensus of the list ?
Dennis