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Oil Temp Display Accuracy

E

Evil Minion

Ready to race!
Location
Indianapolis
Curious how accurate the Oil Temp display in the center screen is. Is there actually a dedicated oil temp sensor, or is it just a calculated value based on coolant temps, etc.?

On another note, is there a way to get it to show temperatures below 120°F through coding? Mine is just --- until it gets into the 120's. If there really is an oil temp sensor, and it really can measure down to the degree, why not just have it show the temperature of the oil no matter what it is, not just above 120?
 
Hoon

Hoon

Autocross Champion
Location
Rhode Island
There's a sensor in the sump.

Not sure about the minimum reading. For all purposes below 120 = cold, so VW probably doesn't worry about reading that low.
 
breaking badly

breaking badly

Banned
Location
St. Olaf
It actually is accurate, though the sensor wouldn't be accurate enough
below a certain threshold and therefore '----' is displayed for a reason.
 
E

Evil Minion

Ready to race!
Location
Indianapolis
Hoon said:
There's a sensor in the sump.

Not sure about the minimum reading. For all purposes below 120 = cold, so VW probably doesn't worry about reading that low.
Click to expand...

Good to know about the sensor.

And I know, I never drive hard unless oil is over 180°F min, 200°F ideally. I just like seeing the actual reading when I turn the car on, and it's annoying that it just shows --- at the beginning. Always get that little worried feeling that the sensor failed or something lol
 
Mk7GTl

Mk7GTl

Go Kart Champion
Location
USA
Your coolant will always reach operating temperature vs your oil temperature. It's normal for the gauge to read --- until about 130F
 
8

8kGoodEnuff

Ready to race!
Location
Northern NJ
Related to this topic... do our cars come with a factory oil cooler?

Or is the "cooling" handled by the larger oil capacity (6 quarts vs. the usual 4.5 quarts for 4-cyl engines), allowing for a larger heat capacity?
 
breaking badly

breaking badly

Banned
Location
St. Olaf
@ evilminion:

It's way better to display '----' than an inaccurate number. ;)



8kGoodEnuff said:
Related to this topic... do our cars come with a factory oil cooler?
Click to expand...
Yes, however it's actually a coolant/oil heat exchanger with the benefit
of not just cooling the oil when the engine is hot, but also warming the oil
after cold starts, since coolant temp uses to raises quicker than oil temp.

It's a well proven design that VW (and many others) are using for decades.

;)
 
8

8kGoodEnuff

Ready to race!
Location
Northern NJ
breaking badly said:
@ evilminion:

It's way better to display '----' than an inaccurate number. ;)



Yes, however it's actually a coolant/oil heat exchanger with the benefit
of not just cooling the oil when the engine is hot, but also warming the oil
after cold starts, since coolant temp uses to raises quicker than oil temp.

It's a well proven design that VW (and many others) are using for decades.

;)
Click to expand...

Is it a donut oil cooler between the block and oil filter or is it integrated into the radiator?

I'm familiar with the design as my S uses a coolant/oil donut heat exchanger
in between the block and the oil filter for cooling/warming the oil.

Thank you for clearing that up... makes me happy to hear that.
 
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