Do short drives degrade engine performance?
 

All...

I am curious if frequent short trips can affect CIS performance.

Drives I am referring to would be less than 25 miles round trip, include spirited driving, but limit the engine temperature to sub 180 degrees in temp.

What are your feelings or reservations?
And if this does impact overall performance, what then is my remedy?

Thanks

I try to never short trip any of my vehicles. More to the fact of getting oil up to temp to burn off any moisture. No comment on CIS performance.

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I agree on having the motor warmed up during a drive. It is very hard on motors to only run them short distances where the oil does not get up to temp.

For many years I only had two cars. My 911 and a VW Beetle. For trips to the store and beach I drove the bug. To work, about 20 miles each way, I drove the 911.

That said, you should be able to get your car warmed up in 5 or so miles. (unless it's freezing weather)

It is said that 90 % of your engine wear occurs during warmup. I have been told you should not rev your motor when the oil is cold above 4000 rpm.

I believe the manual says stay below 3k until the temp gauge comes off the bottom.

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Until your oil gets warm you won't boil off any water condensation that forms. Every weekend I take my cars on a 50 mile "test loop" to get everything heated up...plus, it's fun!

Who wants to drive a 911 for a short trip? If your not having fun driving it, your not doing it right.

its also bad for mufflers/exhaust.
condensation does not boil off and will rust them from the inside out.
true for any car

Well short runs are better than not driving it at all. Don't sweat the details, you could die tomorrow ...just drive it when u want.


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Lol, he's right.

I don't get the logic. You need to get to full temp to "burn off condensation"
Well, if you never start the car, you also will not burn off condensation either.

Oil temp is an indicator of engine component temps.

Metal expands when it is hot.

Engines run loose until they are up to temp and parts are not running at optimum tolerance, therefore don't rev the snot out of them yet.
(But drive them)

Also, a heat differential causes the air to release its moisture. More heat will chase moisture away.

No.


The combustion process pulls water out of the air, as does the gradual heating of the oil and metallic engine components.

Drive it short. Drive it long. Drive it medium.
Drive maintain rinse and repeat