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The manual states "Do not let engine idle to warm up."
Here in the north just about everyone lets the motor idle to warm up, in fact a lot of people have remote start for just that reason.
Does anyone know why Porsche does not want us to do that?
I don't know their reasoning for sure, but my guess would be a few reasons - 1) It's OK to drive the car while it's warming up as long as you don't rev the motor past about 4k rpm until the oil gets up to temp, and 2) it's a waste of resources to let the car sit there and warm up without driving it - your effective mpg goes way down, and 3) driving the car while it's warming up warms up the CATS better, making them more efficient - and there's less pollution as a result.
On the other hand, quite often I let the car sit and warm up properly before running it in a track session or an autocross, and it doesn't hurt the car to do this.
brad
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21-year PCA Member
PCA DE Instructor
No car manufacturer wants you to do that. Idling may warm the engine, but does little to bring the rest of the car's moving parts up to operating temps. E.g., warm engine + cold, sluggish transaxle = excessive wear.
Here in the north just about everyone lets the motor idle to warm up, in fact a lot of people have remote start for just that reason.
In this part of the north (west) everybody and his dog have the couch potato starters too. Heaven forbid putting some decent cloths on and getting some exercise. You'd swear to God that everybody was 95 years old. And idling does not get all the necessary parts up to operating temperature. In fact, in low enough temperatures the bottom of the motor can be at ambient and the top end is hot and nothing is circulating. Lovely conditions for a motor to work in.
Remote starters are less about heating up the engine & drivetrain. They're more about getting the car's heater working so the occupants can go from a warm house to a warm car. I doubt there's a moment of thought given to the car by 99% of the (non enthusiast) population. It's all about creature comfort.
I thought I read somewhere that some sort of (sulphuric?) acid is created during the initial startup/warmup period and that the sooner you can get the motor up to operating temperature the sooner the acid is evaporated and no longer wearing out parts..... so the long idle at low temperatures can result in more engine wear than a more rapid (under gentle/medium load) warm up.
Nick
Remote starters are less about heating up the engine & drivetrain. They're more about getting the car's heater working so the occupants can go from a warm house to a warm car. I doubt there's a moment of thought given to the car by 99% of the (non enthusiast) population. It's all about creature comfort.
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Why waste gas on warm up? I drive off as soon as the engine goes off high idle. Keep the revs below 4000 for the first few miles. I get get heat or A/C in the first 1/4 mile.
This isn't saying to gt into your car and as soon as the key is turned put it into gear and drive off? Cos I idle till the rev's drop and then and only then drive away. It drives my wife mad sitting in a car for two minutes with me smiling at her but I do the same thing in her car(Subaru Legacy) and my commuter(Golf GTI) so I'm consistent. Its funny cos she's the one who says that she wants to drive her car into the ground and I tell her it'll be sooner than she thinks if she doesn't show a little mechanical sympathy. Please don't tell me I'm wrong or I'll never hear the end of it
You'd swear to God that everybody was 95 years old. And idling does not get all the necessary parts up to operating temperature. In fact, in low enough temperatures the bottom of the motor can be at ambient and the top end is hot and nothing is circulating. Lovely conditions for a motor to work in.
