Oil temperature on UK roads

[Norvwich]

There is a property of oils called High Temperature High Shear (HTHS) that fully synth oils do well on. It is tested at 150°C.

I certainly wouldn't worry unless I saw over 130°.

In fact constantly running below 100° bothers me a bit because any moisture in the oil (and you will have some from condensation) takes longer to "boil off". You also have volatiles from the fuel (either petrol or diesel) that need to evaporate off and a warmer oil temp helps with that.

100° for me is simply warm. And more of a target than a worry.

Excellent explanation, thanks

Yous are obviously pussays, spirited driving easily sees 105 degrees, but never much more.

 

[itavaltalainen]

One comment on HTHS though, the oil temperature is not measured in our Golfs where it is the hottest but in the sump. I.e. at 100 degrees in sump it will be massively hotter in other areas of the engine, it will be probably few tens of degrees hotter in bearings, not to speak of round the pistons where it can be multiples of what it is in the sump if you put it down....

[PD_GTI_MK6]

This ^ 

Ah ok thanks.