Discussion
It takes 6 minutes for my coolant gauge to reach half way, that’s 6 minutes at 60mph or 6 minutes in stop start traffic.
Unfortunately Porsche in their infinite wisdom chose not to fit the Cayman with an oil temperature gauge, so I give it 10 miles before I start to use the revs; surely by now the engine and gearbox oil is warm.
I've been playing around with a courtesy 981 which does have an oil temperature gauge, and to my surprise I found it takes a whopping 16 miles (30 minutes) for the oil to get near 90ºC.
I wonder if the same is true for 987.2? I guess we’ll never know, either way I am just surprised how long it takes but I suppose it’s a tribute to the cars efficiency. Having said that, the 2.7 with PDK has not returned better fuel economy figures than my 3.4 although in fairness the car is barely run in.
Just a few observations which I thought might be interesting to share.
Unfortunately Porsche in their infinite wisdom chose not to fit the Cayman with an oil temperature gauge, so I give it 10 miles before I start to use the revs; surely by now the engine and gearbox oil is warm.
I've been playing around with a courtesy 981 which does have an oil temperature gauge, and to my surprise I found it takes a whopping 16 miles (30 minutes) for the oil to get near 90ºC.
I wonder if the same is true for 987.2? I guess we’ll never know, either way I am just surprised how long it takes but I suppose it’s a tribute to the cars efficiency. Having said that, the 2.7 with PDK has not returned better fuel economy figures than my 3.4 although in fairness the car is barely run in.
Just a few observations which I thought might be interesting to share.
Its a question of how warm is warm enough and for how many revs..I bet even after only 6 minutes you are unlikely to be doing too much damage unless you are bouncing off the limiter.
Was/is this not a feature on BMW M cars, when it progressively informs you of how many revs you can use as it warms up? I think I had heard that it doesnt take very long at all to 'allow' you full beanage.
Was/is this not a feature on BMW M cars, when it progressively informs you of how many revs you can use as it warms up? I think I had heard that it doesnt take very long at all to 'allow' you full beanage.
Edited by Johnny G Pipe on Wednesday 19th November 22:07
SkinnyP said:
It takes 6 minutes for my coolant gauge to reach half way, that’s 6 minutes at 60mph or 6 minutes in stop start traffic.
Unfortunately Porsche in their infinite wisdom chose not to fit the Cayman with an oil temperature gauge, so I give it 10 miles before I start to use the revs; surely by now the engine and gearbox oil is warm.
I've been playing around with a courtesy 981 which does have an oil temperature gauge, and to my surprise I found it takes a whopping 16 miles (30 minutes) for the oil to get near 90ºC.
I wonder if the same is true for 987.2? I guess we’ll never know, either way I am just surprised how long it takes but I suppose it’s a tribute to the cars efficiency. Having said that, the 2.7 with PDK has not returned better fuel economy figures than my 3.4 although in fairness the car is barely run in.
Just a few observations which I thought might be interesting to share.
I run to 3k revs for the 1st mileUnfortunately Porsche in their infinite wisdom chose not to fit the Cayman with an oil temperature gauge, so I give it 10 miles before I start to use the revs; surely by now the engine and gearbox oil is warm.
I've been playing around with a courtesy 981 which does have an oil temperature gauge, and to my surprise I found it takes a whopping 16 miles (30 minutes) for the oil to get near 90ºC.
I wonder if the same is true for 987.2? I guess we’ll never know, either way I am just surprised how long it takes but I suppose it’s a tribute to the cars efficiency. Having said that, the 2.7 with PDK has not returned better fuel economy figures than my 3.4 although in fairness the car is barely run in.
Just a few observations which I thought might be interesting to share.
then to 4k revs for the next 4 miles
after 5 miles I tend to just use the car how I want, maybe not 7k red line but normal 5.5k rev driving.
I tend to use the engine not warm oil level reading in the computer, that will say engine not warm to about 5 miles give or take.
Longer on cold mornings ie another mile.
SkinnyP said:
Does the oil level check require the oil temperature or the water temperature?
If the former then these cars must have an oil temperature sensor, in which case I wonder if I can access it through the obcd.
yes you can read oil temps from the OBCD port. but as a guide I think the oil level check is a great way to know you are ok to play a bit.If the former then these cars must have an oil temperature sensor, in which case I wonder if I can access it through the obcd.
anonymous said:
[redacted]
I have no preference whether people choose to talk about or worry themself or others about engine issues per se. My comment was merely an obsevation that your posts of late have a constant theme of criticism, bad news etc. When others proffer their opinions or explanations you are quick to unpick them. If that general feeling is so prevalent one might wonder whether there are redeeming features of the car or ownership experience, as you rarely mention them in comparison, or whether they outweigh the 'bad'. mrdemon said:
SkinnyP said:
Does the oil level check require the oil temperature or the water temperature?
If the former then these cars must have an oil temperature sensor, in which case I wonder if I can access it through the obcd.
yes you can read oil temps from the OBCD port. but as a guide I think the oil level check is a great way to know you are ok to play a bit.If the former then these cars must have an oil temperature sensor, in which case I wonder if I can access it through the obcd.
http://www.ultra-gauge.com/ultragauge/
Johnny G Pipe said:
Was/is this not a feature on BMW M cars, when it progressively informs you of how many revs you can use as it warms up? I think I had heard that it doesnt take very long at all to 'allow' you full beanage.
Yeah but you don't wanna use that as a guide. In my M5 the redline is 6000rpm on cold start up and you can use the full 8250rpm when the oil temp is only 60-65C.I always use double the time the coolant gets to temperature as an estimate in cars which don't have an oil temp gauge.
IceBoy said:
I've been looking into those scangauge type monitors for a while.
Does anyone know of other OBD2 monitors that I could use in my 996 ?
IceBoy
Have you got a smart phone? Plenty of cheap (less than a tenner) OBD2 -> bluetooth adapters on Amazon and then you just need an app to match.Does anyone know of other OBD2 monitors that I could use in my 996 ?
IceBoy
SkinnyP said:
It takes 6 minutes for my coolant gauge to reach half way, that’s 6 minutes at 60mph or 6 minutes in stop start traffic.
Unfortunately Porsche in their infinite wisdom chose not to fit the Cayman with an oil temperature gauge, so I give it 10 miles before I start to use the revs; surely by now the engine and gearbox oil is warm.
I've been playing around with a courtesy 981 which does have an oil temperature gauge, and to my surprise I found it takes a whopping 16 miles (30 minutes) for the oil to get near 90ºC.
I wonder if the same is true for 987.2? I guess we’ll never know, either way I am just surprised how long it takes but I suppose it’s a tribute to the cars efficiency. Having said that, the 2.7 with PDK has not returned better fuel economy figures than my 3.4 although in fairness the car is barely run in.
Just a few observations which I thought might be interesting to share.
Pretty much what I would expect and have confirmed in part by monitoring coolant temperature.Unfortunately Porsche in their infinite wisdom chose not to fit the Cayman with an oil temperature gauge, so I give it 10 miles before I start to use the revs; surely by now the engine and gearbox oil is warm.
I've been playing around with a courtesy 981 which does have an oil temperature gauge, and to my surprise I found it takes a whopping 16 miles (30 minutes) for the oil to get near 90ºC.
I wonder if the same is true for 987.2? I guess we’ll never know, either way I am just surprised how long it takes but I suppose it’s a tribute to the cars efficiency. Having said that, the 2.7 with PDK has not returned better fuel economy figures than my 3.4 although in fairness the car is barely run in.
Just a few observations which I thought might be interesting to share.
These engines are cold-blooded and require considerable time to warm up. I have observed this over the years by monitoring coolant temperature in real time using an OBD2 code reader/data logger connected to the car. At other times I have logged this with a data logger connected to the OBD2 port.
Oil temperature always lags coolant temperature. While I do not have an oil temperature gage I know that even if the coolant temp gage is reading the engine coolant temp is nominally up to temperature the gage is often optimistic and the coolant temperature obtained from OBD2 is less.
The Turbo has an oil pressure gage and one can get a good feel for oil temperature based on idle oil pressure. It takes some engine run time before this idle oil pressure obtains its stable hot idle pressure.
Thus before I consider the engine -- both its coolant and oil -- fully up to operating temperature I require some additional minutes of driving/engine running after the coolant temperature needle has reached the general vicinity of where it spends its time.
Johnny G Pipe said:
Its a question of how warm is warm enough and for how many revs..I bet even after only 6 minutes you are unlikely to be doing too much damage unless you are bouncing off the limiter.
Was/is this not a feature on BMW M cars, when it progressively informs you of how many revs you can use as it warms up? I think I had heard that it doesnt take very long at all to 'allow' you full beanage.
"I bet even after only 6 minutes you are unlikely to be doing too much damage unless you are bouncing off the limiter."Was/is this not a feature on BMW M cars, when it progressively informs you of how many revs you can use as it warms up? I think I had heard that it doesnt take very long at all to 'allow' you full beanage.
Edited by Johnny G Pipe on Wednesday 19th November 22:07
Not exactly a warm/fuzzy recommendation to hammer on the engine prior to it being warmed up.
IIRC, Porsche recommends keeping RPMs below 4200/4000 until the engine is warmed up. The question then becomes when is the engine warmed up, at its operating temperature?
This is dependent upon the ambient temperature and how the car is driven, while of course staying below the upper RPM limit stated by Porsche.
A general rule of thumb would be twice as long as it takes for the coolant temp gage to indicate the engine's coolant temperature is at nominal hot operating temperature. For instance, if it takes 6 minutes -- just a number -- for the temp gage needle to rise off the floor to 180(F) or 80(C) or 90(C) then allow another 6 minutes of engine run time.
I dare say in real cold weather this may not be sufficient. In fact I can assure you that an engine that obtains 190F (actual) or higher on the highway during a summer drive will be hard pressed to reach 180F (actual) on the same drive on a cold winter day.
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