Thoughts? Clearly corporate jews trying to keep people from wasting previous fuel.
>MUH CORPORATE JEWS
Fuck off back to /pol/ and learn how engines work instead of just making retarded IDS HABBEDING threads when you clearly have no idea what you're talking about.
Engines suffer by far the most wear when they're cold and you're doing nothing but prolonging that state by being a fucktard and ignoring your car's manual because you apparently know better.
The wear is immeasurable. Diesels idle for fucking hours.
I do and will continue to let my car idle for a minute before I drive.
And I will also continue to keep it under 2k rpm and low load until it's at 160.
Fucking starting and driving a car is bad for a car.
Anything you do to a car causes damage.
That being said, fuck it. Cars are idled until warm every fucking day by thousands upon thousands of people and have been for decades. Who gives a fuck?
>Ciatti has worked on combustion engines — engines that generate power from burning fuel, like gasoline —
>a cold engine idling at 600rpm is doing more damage than a cold engine under load at 2500rpm
Every fucking time it's mind blowing how things like this are totally new to Burgers and even a controversy while we learn things like this when learning for the driving license.
But then again the schooling takes several months and we have to pay >€1500 for that fucking thing.
Considering that my clutch doesn't want to let me shift into gear when it's that cold unless you really force it, I think I'll keep idling for a minute or two when it's below freezing out.
My car idles at 2K when upon startup its really cold out but then gets back to 1k when warmed up, is that bad?
>implying anyone reads the owner's manual
Idling a car to warm it up is *best practice,* even in warm weather.
I am a mechanical engineer, just like the person cited in OP's article.
That's too bad for them. They're morons for not keeping track of it.
>I am a mechanical engineer
Highly doubt that. Where do you work, even if you are? This guy works at a national laboratory.
This is NOT A THING ANYMORE. With modern oil, engine design and oil pumps you DO NOT NEED TO WARM A CAR UP!!!! Jesus Christ. Oil is flowing where it's needed the second you start the car. Go spread your bad 1920's information elsewhere.
It's not about lubrication, it's about how metals change with heat. Engines are made of many different materials, and they expand with different rates as they are heated. Engine tolerances are designed for operating temperatures. When I had an STi, it would have piston slap like a mofo if you didn't warm it up for at least ~2 minutes.
Pic related, metals actually change their states depending upon temp and composition.
I work as an FVT&E Engineer at Harley-Davidson, degree from Kettering University.
>park car in garage
>attached to house so always above freezing
>25 years of owning GM products
>never a single engine issue
>Cylinders shrink when cold
>pistons shrink the same amount when cold
>same for all bearings
>tolerance is the same when cold as when hot
I'm no engineer, but it's well known that piston tolerances are designed based on heat expansion. And everyone knows an aluminum head on a cast iron block will fuck up your head gasket (or for special ed GM, aluminum block and cast heads...).
They are measured at room temp when determining, as a customer, if the pieces you got were mad correctly. However, when they were designed by engineering, they consider only operating temperatures.
>it's well known that piston tolerances are designed based on heat expansion.
Sure, they are designed to expand, but that doesn't discount the fact that they are optimized at operating temp.
>And everyone knows an aluminum head on a cast iron block will fuck up your head gasket (or for special ed GM, aluminum block and cast heads...)
What's your point? I've had cars with iron blocks/alum heads.
Holy fuck takes an engines 101 class. More fuel = lower combustion temps, even carburetted cars have this kind of system at cold start.
More fuel does not equal higher RPM, you need more air to thats why the choke also opens the throttle (And the cold start idle in cars with electronic sensors)
And what about the fact that the oil temp and pressure is still low from being shit off overnight? All they mention is that more gas might wash some of the oil off... But that's going to happen anyway when you start driving for the first minute or so, and to make things worse, you're putting more load on it while the oil is still cold, thick, and before pressure has built up, meaning that it isn't going to be applied to the cylinder as effectively, anyway!
Most people aren't idling their DD for more than 1-2 minutes at a time. I usually start my car before I start brushing/scraping the frost off the windows and windshield, which I will keep doing, regardless of what one mechanic says to Business Insider.
that is completely normal. It idles faster until the engine warms up. People who let their cars sit and idle until the entire inside of the car is hot are retarded. Letting your car idle for any amount of time after its warm is not good for it; it's better to be putting a load on it than let it sit. Idling is a way to keep fuel consumption low while sitting stopped for short periods of time where it would not make sense to turn the car completely off, it is far from the optimum operating condition.
>This old argument
What's your manual say? Do that. There isn;t a one size fits all answer to this debate.