It is my understanding that Frank Grunthaner has an engine with two oil
coolers on it.
He measures the temp going in and out on each one, in addition to oil
temp from possibly two more locations.
I think this is an experiment for him rather than normal practice.
I also believe that you can find this report in the archives.
When I want to know the real temperature on my Type IV air-cooled I put
two drivers side wheels on a curb or park on an uphill incline them
measure the temp through the oil fill pipe with a candy thermometer
dropped down the tube.
I don't question the new temperature measuring devices ............ I
just don't want to waste this good $3.29 candy thermometer.

Stan

On Mon, 28 Oct 2002 16:09:04 -0500 Ed McLean <email99@BELLSOUTH.NET>
writes:
> Mathew Pollard wrote:
>
> "the books I have on engines always say the ideal oil temp is 109deg
> C".
>
> I agree there is an ideal oil temperature but where do you measure
> it?
>
> Is this measured in the oil pan, after it has been heated by the
> engine,
> or at the oil filter, after the oil cooler and immediately before
> it
> enters the oil galleys?
>
> I have measured oil temperature by strapping a thermocouple to the
> oil
> filter under a piece of foam insulation and it works ok.   I
> haven't
> compared the temperatures to the oil pan temperatures.  I think
> Frank
> Grunthaner recently made reference to the efficiency of the
> oil-to-water
> oil cooler in an I-4 engine so I believe he might have made these
> measurements.
>
> At least in the VW world, measurements are usually made in the pan,
> on
> the dipstick, or in the oil filter adapter (for I-4 engines).  All
> these
> are before the cooler.  I wonder how much the temperature drops in
> the
> oil cooler?
>
> Let us know what you find out, Matthew.
>
>

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