Hi,

My car during winter was not warming up too well, so decided to change thermostat. Alongside had oil change (5W30).

Now - I did not replaced this second thermostat TH 5 75 I read about, firstly because read about it too late, and secondly because I was not sure about it, but now not so..

Temp for coolant goes up better, but oil temp is having problems getting to ~90 Celius - it takes far longer than coolant and on top of that it has serious problems with stabiility.

On motorway travel it can actually hit 99 degrees, whereas on city drive it can go down to even 86 when not at speed.

 

Is it a problem or normal behaviour of new oil?  I do have DSG gearbox, hence mention about TH575..

"90 Celsius - it takes far longer than coolant "  - that's normal behaviour.

 

"On motorway travel it can actually hit 99 degrees, whereas on city drive it can go down to even 86 when not at speed."  -  that's normal behaviour as well.  When the oil is older you will find it will go over 100 quite often. 

 

The superb diesels are slow to heat up their oil. In winter, mine would often take 20 mins/30 kilometres at least before the oil caught up to the coolant - summer would obviously be quicker.

 

(Note: I'm assuming you have a diesel...?)

Edited 18 February, 20206 yr by TheRobinK

Hi,

Yes, diesel.

That 99 Celsius is what's actually worrying me, is anyone else see that high temps on oil?