There are two things you could do. Drive slower and lower your oil level.
Those oil temps are common for an overfilled engine. The top mark is not the
full mark. It is the maximum do not exceed no matter what mark. At oil and
filter change time use only 4.5 quarts. After running your engine to fill
the filter check the level and make a new mark on the stick as your full
mark. This alone may help by 10-20 degrees.

After that a well-designed oil cooler system will keep the oil temperature
around 210. I use a 16 plate flat style cooler mounted in front of the
radiator. You will need a thermostat with this size-style cooler. I prefer
the in line 4 port units to the coolers in the adapter. I also remove the
stock cooler and blank off the hoses. This set up has worked well on many
vans I have done.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Robert Clemmer
Sent: Friday, September 25, 2015 4:17 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Oil Temperature??

I have a 91 2.1 WBX that just turned 300K miles on this past trip to FL.
The oil pressure is fine until the oil temperatures start to go on the north
side of 220 then it starts dropping proportionately with oil temperature.
Oil temperature starts climbing proportionately with outside air temperature
when the temperatures are above 85.  When it is 95 or higher outside my oil
temps can go 240-250 and pressure will drop to 30 psi at 4000 rpm.

Those of you have that have installed external oil coolers, how effective
have they been?  What kind of temperature drop can I reasonably expect if I
decide to install an external cooler when I pull this engine to "freshen it
up"?

Thanks for your comments, BobC