Is anyone else noticing huge differences in readings of oil temperature between the standard gauge and maxi-dot display?

For example as soon as the needle on the gauge reaches 90°C (straight up) the maxi-dot reading would be around 50-60°C. How can one know then if the engine has already reached it's working temp or not?

Which is correct?

The gauge shows Coolant temperature i think not Oil?

Correct yes and I know that - sorry for misleading title. But the point I was making is that those 2 readings are nowhere near while the manual states the engine reaches it's working temperature as soon as the (coolant) gauge is showing 80+ degrees (page 13) and then again on page 30 the manual states the working temp is reached when the oil temp is 80+ degrees. And in both cases it instructs to avoid high engine revs, speeds obv.

 

Basically the manual is either inconsistent or one of the readings is off IMO.

 

So which is correct? I would say the oil needs to reach 80+ degrees not the coolant but the gauge is showing coolant  :think:

Aha! I don't know :(

Do all Octi's come with an oil temp readout? maybe the coolant temp guide is for people who can't see oil temperature?

Well in that case the way I see it one can think the engine has reached proper working temp and start pushing the engine too soon. I mean the coolant is showing 90°C yes but the reality is the oil is still at only 60°C or so...

 

Not sure if all Octi's have an oil temp readout but most probably do have it.

Regards coolant it says the engine reaches temperature when at 90 degrees. Regarding Oil, it says 80 to 110. Yes the oil is usually taking longer to warm up, but what temperature is it reading when the coolant reaches 90? It isnt that far off 80 is it? It looks like they have approximated for the manual, and in reality it is slightly different. But not too far out.

 

There is nothing to suggest the manual has got confused, or that one of the sensors is incorrect. They have just given you an approximate figure for both, but as is to be expected, in the real world, they dont quite match up. I'll check how far out the oil is from 80 degrees when the coolant shows 90.

Aha! I don't know :(

Do all Octi's come with an oil temp readout? maybe the coolant temp guide is for people who can't see oil temperature?

The oil temperature read out is one of the functiuons on the Amundson. Dont know about any others.

All cars, no matter what make, get the coolant temp gauge next to the fuel gauge. Considering not all cars get the oil read out, id suggest the coolant temp is the figure to look at.

 

The oil temp seems to be reliant on engine speed an awful lot. Slow down, and the temp reduces ever so slightly.The coolant temp doesnt.

Regards coolant it says the engine reaches temperature when at 90 degrees. Regarding Oil, it says 80 to 110. Yes the oil is usually taking longer to warm up, but what temperature is it reading when the coolant reaches 90? It isnt that far off 80 is it? It looks like they have approximated for the manual, and in reality it is slightly different. But not too far out.

 

There is nothing to suggest the manual has got confused, or that one of the sensors is incorrect. They have just given you an approximate figure for both, but as is to be expected, in the real world, they dont quite match up. I'll check how far out the oil is from 80 degrees when the coolant shows 90.

 

Well a difference of 30-40°C in my case is a bit too much IMO (coolant 90°C while the oil only between 50-60°C). So it is far off 80.

Id go by the coolant. If the coolant has reached that temperature, then the engine must be that temperature. The oil is more susceptible to the engine speed i think.

Is anyone else noticing huge differences in readings of oil temperature between the standard gauge and maxi-dot display?

For example as soon as the needle on the gauge reaches 90°C (straight up) the maxi-dot reading would be around 50-60°C. How can one know then if the engine has already reached it's working temp or not?

Which is correct?

 

They're both correct, they're just 2 very different liquids doing very different jobs.  Oil is alot thicker than water so take longer to heat up.  It's the oil that lubricates the engine so that's more important.

Personally wait until oil temps are up to a circa 90 before I drive her hard. As above oil is doing a more important job within the engine with regards to preventing wear on parts etc.

The oil temperature read out is one of the functiuons on the Amundson. Dont know about any others..

 

No it's not, its a function of the Maxi-dot.

 

All cars, no matter what make, get the coolant temp gauge next to the fuel gauge.

 

No they don't.  I had a fabia courtesy car last year that didn't..... My Dad's BMW 330D coupe doesn't......

You will get quite noticeable differences in the water temp on the gauge and the oil temp on the maxidot. The water will stay fairly constant whereas the oil temp will change quite a lot depending on whether you are taking it very easy or going for it. Not a problem I would have thought, if the water is showing 90 degrees then wait a few more minutes before really going for it.

Ian

Isn't water temp. regulated by the radiator thermostat value ? Wouldn't that explain some of the difference.

 

I think I'd wait foe the oil temp. before giving her the big right foot although, when not yet fully awake & really late for work................

 

Regards

T

The oil temperature is the critical one, cold more viscous oil won't do its job properly until warmed up, and until it does critical engine components (main & bottom end bearings, piston rings, gudgeon pins etc) won't be at their optimum clearances. Don't push the engine too hard until the oil temperature is warm, no matter what the coolant temperature is.

No it's not, its a function of the Maxi-dot.

 

 

No they don't.  I had a fabia courtesy car last year that didn't..... My Dad's BMW 330D coupe doesn't......

Sorry it is the Maxi Dot yes. Excuse that other blond moment!

 

I stand corrected on the coolant temp gauge as welll. Every car ive had has always had one. I assumed all cars did.

My apologies

o

The oil temperature is the critical one, cold more viscous oil won't do its job properly until warmed up, and until it does critical engine components (main & bottom end bearings, piston rings, gudgeon pins etc) won't be at their optimum clearances. Don't push the engine too hard until the oil temperature is warm, no matter what the coolant temperature is.

Good point. Wasnt thinking of the temperature of the liquid. Was more thinking of the temperature of the engine. Not a lot of good if the oil is still cold, as you say. Time for me to engage brain a bit more next time. Perhaps the oil wasnt up to temperature in my brain :think:

Talking " bottom ends" rather than "big ends" betrays my marine engineering background!

Really unusual feature to have an oil temperature readout, normally such a feature only comes on high end sports cars.

Edited 12 January, 201412 yr by Timoctav

What is the hottest Oil Temp you have see ? 96 is my hottest in 3 months of owning my car.

What is the hottest Oil Temp you have see ? 96 is my hottest in 3 months of owning my car.

 

105C and that in winter, used to only see than in summer in my mkII

105C and that in winter, used to only see than in summer in my mkII

I will be interested to see what I get when I'll drive to south of France in August.

Handbook states the following;

 

Oil temperature
If the engine oil temperature is in the range 80-110 °C, the engine operating temperature
is reached.
If the oil temperature is lower than 80 °C or above 110 °C, avoid high engine revs,
full throttle and high engine loads.
If the oil temperature is lower than 50 °C or if a fault in the system for checking
the oil temperature is present, --- are displayed instead of the oil temperature.

 

With the current Yeti TDI I have seen the coolant get to operating temperature within 5 or so miles of leaving home on a cold winters morning but the oil take a further 5 to 10 miles to get to eighty plus. Even experienced the oil drop to just above 70 on long runs aross the Wolds when the outside temp figures are -5 deg C or lower. DPF regularly regenerates in the winter as the engine gets so cold but Skoda say no fault, so I've been fitting a lower grill cover which has helped.

 

Oh also seen the oil higher then 110 deg c on a summer hill climb, so it will be interesting to compare this experience with the Octy when it arrives; hoping the need for another scarf is not required.

 

 

TP

Handbook also states the same for coolant and since the two temperatures don't match (first 15min) it's poorly written IMO. It should be written more clearly which of the two is more important or that both temperatures need to reach 80+ degrees.

 

The coolant temperature gauge » Fig. 4 only operates when the ignition is switched on.

Cold range

If the pointer is still in the left area of the scale, this indicates that the engine has

not yet reached its operating temperature. Avoid high speeds, full throttle and

high engine loads. This prevents possible damage to the engine.

 

The operating range

The engine has reached its operating temperature as soon as the pointer moves

into the mid-range of the scale. At very high ambient temperatures or heavy engine

loads, the pointer may move even further to the right.

 

High temperature range

If the pointer reaches the red area of the scale, the coolant temperature is too

high. Further information » page 22.

I got my oil temperature up to 100^oC just by normal driving on motorway at legal speeds at around 0-5^oC exterior temperature. Will be interesting to see what it does in the summer time at >30^oC.

 

PekoSI you can't be that surprised that the manual isn't the best at relaying correct information, right?

Hardly surprised   Just wanted to know what you guys have to say about it. Even though there is noticeable improvement between April's and November's version of the manual some chapters are still poorly written...