When I purchased my Superb in June, it reached full running temperature in a few minutes and regularly gave me 53mpg or even better. Since the weather has got colder, the mpg has dropped which is not unusual for a diesel, but I have also noticed that it takes ages to reach normal running temp when started from cold. It can take around 25 mins for the temperature gauge to reach 90, which makes me wonder if the thermostat is faulty? It is a 170 automatic, a year old with 9k on the clock.

i have the same and i think its normal.

in Audi A6 its quicker.

all diesel take longer as petrol to warm up

Does the temperature drop again while driving?

Think "winter diesel" also causes a drop in MPG... They introduce this during November, about the same time mine dropped by 2-3 MPG... :( 

 

Mine does seem to warm up in about the same time, very quick in fact compared to the old Seat Exeo I had before... could do about 30 miles and still not be up to temp ..lol

 

I have noticed that the Superb seems to idle faster more often...

 

For instance, been out today, and as usual when I first start it in the garage the revs are just below 1000 rpm and the "Stop/Start" is inactive... drove 20 miles no issue, stopped at the destination (Toby Carvery) put the DSG in "P" engine stopped as usual (Stop/Start) all good.. 

 

Came out about an hour later, fast idle and "Stop/Start" inactive.. drove a couple of miles back to normal.... 

 

I am not sure if this is an issue "lurking" with the DPF sensor as it does seem to want to regenerate quite often... or just down to the cold/frost temperatures... 

 

Any one else noticed this? 

 

Stuart

When I purchased my Superb in June, it reached full running temperature in a few minutes and regularly gave me 53mpg or even better. Since the weather has got colder, the mpg has dropped which is not unusual for a diesel, but I have also noticed that it takes ages to reach normal running temp when started from cold. It can take around 25 mins for the temperature gauge to reach 90, which makes me wonder if the thermostat is faulty? It is a 170 automatic, a year old with 9k on the clock.

I agree. Compared to our TD140, our CR170 seems to take an age to warm up once the temp drops below 0...

Think "winter diesel" also causes a drop in MPG... They introduce this during November, about the same time mine dropped by 2-3 MPG... :( 

 

Mine does seem to warm up in about the same time, very quick in fact compared to the old Seat Exeo I had before... could do about 30 miles and still not be up to temp ..lol

 

I have noticed that the Superb seems to idle faster more often...

 

For instance, been out today, and as usual when I first start it in the garage the revs are just below 1000 rpm and the "Stop/Start" is inactive... drove 20 miles no issue, stopped at the destination (Toby Carvery) put the DSG in "P" engine stopped as usual (Stop/Start) all good.. 

 

Came out about an hour later, fast idle and "Stop/Start" inactive.. drove a couple of miles of back to normal.... 

 

I am not sure if this is an issue "lurking" with the DPF sensor as it does seem to want to regenerate quite often... or just down to the cold/frost temperatures... 

 

Any one else noticed this? 

 

Stuart

Yes Stuart. Our CR170 has also been on fast idle more often too. Again I don't know if it's the regen operating, but deffo only been happening since it's got colder...

Yes Stuart. Our CR170 has also been on fast idle more often too. Again I don't know if it's the regen operating, but deffo only been happening since it's got colder...

 

 

At least it's not just mine ... Does your "Stop/Start" become inactive?

 

I am sure it is not to do with a DPF regeneration because they do not start, or should I say, should not start until the car is at normal temperature amongst other things... this happens if I start the car after it has stood for an hour or so.. Always does it when I get it out the garage because it's cold.

 

drove to the carvery and it does as normal, come to a stop, put in "P", "Stop/Start" turns engine off,  I started it at the Toby Carvery after about an hour, straight to 1000 rpm or just under, and the "Stop/Start" did not operate (symbol on dash) .. I think the temp gauge was around a quarter of the way up.. drove a couple of miles, temp normal all back to normal.. 

 

Really sounds temp related

 

I am due to take the old Ibiza in for an MOT next week at the SEAT/Skoda dealer so I may ask the question

When I purchased my Superb in June, it reached full running temperature in a few minutes and regularly gave me 53mpg or even better. Since the weather has got colder, the mpg has dropped which is not unusual for a diesel, but I have also noticed that it takes ages to reach normal running temp when started from cold. It can take around 25 mins for the temperature gauge to reach 90, which makes me wonder if the thermostat is faulty? It is a 170 automatic, a year old with 9k on the clock.

 

25 mins looks too long. What outside temperature? And is your car fitted with additional heater (which works when engine is running - standard equipment for cold climate regions)? 

However if the termostat is faulty, when temperature should reach 90 when driving in town, but then drop to 70 or 50 when driving on motorway.

Have in mind that there are two thermostats in your model. One for the engine and one for the gearbox

Thanks fo the replies.

 

I've owned six diesels over the last ten years, a mixture of four cylinder and six cylinder cars, and I do generally find the economy is not as good in the winter. They typically take longer to warm up than the petrols I have owned, but most have been at full running temperature within ten minutes, which is why this seems abnormally long to me. But, this is my first Skoda which is why I am unsure if this is a fault or not. I have had a couple of cars which needed replacement thermostats, but in those cases I had the scenario described above of the car reaching optimum temperature in traffic, but then dropping once on the move. I do not have this here as the Superb seems to maintain its temperature once warmed up, but takes an excessively long time to get there when started from cold. Also, the thermostats have needed replacing at quite high mileages, and certainly not within the first 10k.

 

I asssume there will be a first service due soon, at which point I will ask about this, but I think my question is whether this is something that needs addressing before that point?

Just had a chat with a friend who works at the dealers regarding the increased RPM.. makes sense to me... 

 

Sounds normal for cold weather. Because when its cold we have heaters, heated screens, heated seats, glow plugs, headlights and lots of other electrical load which wouldn't usually be used other than in cold conditions… the battery needs to charge more, thus the ecu detects high load and compensates by increasing rpm slightly to charge battery sufficiently. Thats why after a bit of driving it will behave normally. Because the battery has had a good charge. Also start stop won't work when the outside air temp is less than 8 degrees (i think) deviation from inside air temp and other prerequisites. See manual.
Nothing to worry about stu

The Superb is my third diesel Skoda and I too have noticed that the RPM stays higher for longer when the outside air is cold.

 

I can do 10 to 15 miles at a decent speed, arrive at a junction and instantly hear that the RPM is still at 1,000 RPM.

 

Once the temperature gauge reaches 90 degree's then all returns to normal.

 

As already pointed out this is not DPF related as the DPF will never attempt a regen if the engine is not already up to normal operating temperature.

 

Neither my Octavia vRS or Octavia Scout maintained a high RPM for as long as my current CR140 manual Superb does (no stop/start).

This is only my second diesel, the SEAT Exeo was the first, and I can't say I noticed any increase in RPM other than when I first started it on the day, i.e out the garage in a morning.. this did take for ever to warm up on a cold day though... 

 

The Superb seems to warm up just as quick and the gauge gets almost central... 

 

Will keep an eye on the gauge next time it does it.. 

I cant say I've noticed anything different in my 170 than previous diesels. My wife's CR-V diesel takes forever to warm up however and much longer than the Superb. I'll listen out for the increased RPM in future but certainly havent noticed it. This might however be because of my typical route from home that sees me quickly onto a stretch of DC and then A roads with few junctions to idle at before the engine reaches usual operating temps...

Mine takes about 10 to 15 minutes to reach 90 degrees but can take longer in colder weather.  The RPM will also remain higher for longer in this weather.  It doesn't differ though from a previous PD engine I had as this behaved similarly

Just had a chat with a friend who works at the dealers regarding the increased RPM.. makes sense to me... 

 

Sounds normal for cold weather. Because when its cold we have heaters, heated screens, heated seats, glow plugs, headlights and lots of other electrical load which wouldn't usually be used other than in cold conditions… the battery needs to charge more, thus the ecu detects high load and compensates by increasing rpm slightly to charge battery sufficiently. Thats why after a bit of driving it will behave normally. Because the battery has had a good charge. Also start stop won't work when the outside air temp is less than 8 degrees (i think) deviation from inside air temp and other prerequisites. See manual.

Nothing to worry about stu

 

Well, thats's interesting and solves it I guess. I'll take it out without anything on (HRW, heating, heated seats in my case) and see what happens, but the 300rpm increase could also be outside temp related too. I've found (naturally) if I switch-off the heater it does help to speed the warm-up.Nevertheless, the car does take far longer to get to 90c than our MKI.

 

My wifes petrol 2.0 gas-guzzing Focus has Climate and on that, when you set the heater to "High" the fan does not spin-up to high speed until the engine has warmed-up sufficently to deliver heat to the cabin.

Go and buy the two grill covers from Super Skoda which limit the cold air into the radiators, this cuts warm up time down by at least half, but still allows the fan to bring in cold air from else where to cool the radiator.   

I have the cold weather grille fitted and definately made a difference on mine regarding warming up and economy. Purchased from superskoda.

Apart from unusually low water temperature, how much longer (time or distance) does it take for the oil temperature to reach either the normal running temn't know perature, or the 50 degree

 point which is the lowest figure which can be displayed?

 

(If you don't know how to find the oil temp. it's one of the MFD options on your maxidot.)

 

DC

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Edited 6 January, 201511 yr by peterposh

I find mine takes about 10 km to get fully warm. You've probably got a faulty thermostat

I find mine takes about 10 km to get fully warm. You've probably got a faulty thermostat

Seems a lot of us have faulty thermostats then.....

What are your typical journeys like for the first 10 mins? Urban, country, dual carriageway/motorway; and how fast?

My observations from driving home today.

Took the car at -9.5, journey ended at -14.

No pre-heating.

Temp gauge started to move after 5 minutes, oil temp showed 50 after 7 minutes. At this point I had to decrease inside temp to 22 from 24 (too hot air for my eyes was blowing...). Temp gauge showed 90 after 11 minutes (oil temp 72 at this point). After 15 min oil temp reached 84 and stayed like this.

Driving conditions - first 5 min - old city driving (20-40 km/h), later on city driving in average traffic.

My skoda 140 takes the same time and distance as my mondeo 140 to warm up

If it's not already said,

 

Cold air takes longer to warm up than hot air, this then translates as longer warn up times resulting on the car running on ecu choke longer, also when stopping the car engine cools faster and warms up slower resulting in more choke that the summer doesn't need,

 

Really ppl is it that difficult to work this out?

 

Hot temps can also effect fuel consumption, the engine will run tighter (expanded) and produce more friction than normal, it's a sweet spot of metal expansion and unassisted cooling that produces the best MPG,

 

If you are in a 2.0 CR and it's actually producing 45+mpg  your car is working A1

 

A 1.6CR will likely return 50-55mpg @ 70mph

 

All these magic figures are lab figures, no car meets em, mine is 36mpg urban 28 reality, most 2.0 CR DSG Superbs will return 32mpg on the urban cycle, you have to ignore the we want to sell it BS.