oil temp very high, water temp normal. Any ideas?

[williamp]

Got a problem with my Aston DBS V8, and the forum and two specialists have rtun out of ideas.

Basically, the car has 10 litres of oil and a few more litres of water. Its a lot of fluid to get hot. Usually, the water gets to 70 deg, and the oil about the same on a hot day.

However, my oil gets very high- over 100 degrees indicated. Its not high speed running- just idling in the garage for 10 mins or so. Even on a low speed drive (max 1500 rpm) the oil goes very high.

And we cant figure out why.

-Its not the sensor. New one replaced old, same symptoms
-Its not the gauges: both oil and water gauges recently refurb'd, and swapping the feeds shows the same increase on either dial
-It did have a blockage in the system, but now it has now oil pipes and both new oil coolers. In fact, after an idle in the garage the oil coolers get very hot to the touch.

So, I am certain the oil IS getting hot, rather then something misreading.

-Oil pressure is good throughout- what you'd expect. So oil pump is OK.
-The spark plugs indicate its not running lean

Any ideas?

[williamp]

last oil change was approximately 8 miles ago, and a few miles before that when I changed the sensor.

Thanks for the input, but all the other Aston V8 engines dont run 100 deg oil tmep- about 70-80 deg for both is normal. Hence my concern (the gauge, for example is "max" at 120 deg, with the middle at 70 deg). These enignes are known to be opver-cooled, and often its a real struggle to get heat into the oil in the colder months.

[williamp]

No thermostat added.

The pipes and both oil coolers are brand new.