Would you buy this car? - Porsche 718 Forum
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post #1 of 20 Old 03-24-2019, 08:35 PM Thread Starter
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Would you buy this car?

Looking at a great, great deal on a new 718 CS to add to my garage (next to my base 718 Boxster.)

The car is new, but here's what is giving me pause: it was delivered in November 2017 and has been at the dealer ever since. It has 180 miles on it and has apparently been showed at auto shows. The car is immaculate, but judging from my experience with aviation piston engines, the absolute worst thing you can do to an engine is to run it and then let it sit for months. Engine combustion creates moisture, which creates condensation and will build up rust on the cylinder walls. In the aviation world this is easy to determine: we pull a spark plug off each cylinder and do a borescope inspection and compression test. In the automobile world, I can envision doing that procedure for a well-used car but I can't imagine a Porsche dealer allowing that to be done to a new, never-sold car.

What do you all think? Do car engines suffer from inactivity in the same way that aircraft piston engines do? Obviously the car has the full Porsche warranty but obvious problems wouldn't necessarily arise until years down the road (low compression, etc etc.)

Any info would be splendid. Thank you folks!
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post #2 of 20 Old 03-24-2019, 08:51 PM
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Of course depends on what a great, great deal is but . . . get it!
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post #3 of 20 Old 03-24-2019, 09:02 PM
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Originally Posted by kfahmi View Post
Looking at a great, great deal on a new 718 CS to add to my garage (next to my base 718 Boxster.)

The car is new, but here's what is giving me pause: it was delivered in November 2017 and has been at the dealer ever since. It has 180 miles on it and has apparently been showed at auto shows. The car is immaculate, but judging from my experience with aviation piston engines, the absolute worst thing you can do to an engine is to run it and then let it sit for months. Engine combustion creates moisture, which creates condensation and will build up rust on the cylinder walls. In the aviation world this is easy to determine: we pull a spark plug off each cylinder and do a borescope inspection and compression test. In the automobile world, I can envision doing that procedure for a well-used car but I can't imagine a Porsche dealer allowing that to be done to a new, never-sold car.

What do you all think? Do car engines suffer from inactivity in the same way that aircraft piston engines do? Obviously the car has the full Porsche warranty but obvious problems wouldn't necessarily arise until years down the road (low compression, etc etc.)

Any info would be splendid. Thank you folks!
...as long as it wasn't abused between shows (over rev's etc.), and it truly is immaculate...yes, I'd buy it without reservation. However, I'd still expect a serious discount or what's the point? If not, might as well put my cash towards a "newer" one if that was the case...IMHO...
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post #4 of 20 Old 03-24-2019, 09:40 PM
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I personally don't think there will be a problem but I would have them change the oil/oil filter and I would want a new battery. Other things to keep in mind is the fuel tank probably has moisture in it as well as the brake and transmission fluid. Though, I turned down a 2RS that had 15 miles but was sitting around for over a year............FYI.
If they will change the fluid(s) I would advise observing them while they change it (them).

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post #5 of 20 Old 03-25-2019, 09:15 AM
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That works out to about 10 miles/month, which I wouldn't be surprised for a dealer demo model. My point being related to your aviation engine example in that if the car is run a couple of times a month, even for short periods, my bigger concern would be the fluids (engine oil and brake fluid) getting condensation in the mix. Change the fluids and presto, new car!

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post #6 of 20 Old 03-25-2019, 09:50 AM
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Cars get stored for 6 month winters all the time.

300 is plenty, 350's too many, and 365 is not enough.
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post #7 of 20 Old 03-25-2019, 10:35 AM
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My 718 has been in storage since November...full tank of gas with Stabil added...its been on a charger and hasn't been started...the worst thing for an engine is to start it and not drive it....the moisture builds up and doesn't get burned off...
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post #8 of 20 Old 03-25-2019, 11:19 AM
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How many miles are you going to put on it before the warranty expires ? Those types of issues are going to show up sooner rather then later . I would not be concerned .

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post #9 of 20 Old 03-25-2019, 02:53 PM
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not a car situation, but I have a boat with an outboard motor and it gets winterized and stored for 6-7 months a year outside in colorado. being an outboard the dealer changes the oil abd gear lubes, puts stabil in the tank (run into the motor) and I think fogs the plugs. it's coming up on it's 10th year and we've had no problems with the engine since we bought it. Well, we had a fuel system issue but that was not related to winter or storage - it was a known material issue the manufacture has since resolved.
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post #10 of 20 Old 03-25-2019, 05:28 PM Thread Starter
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Thanks all for the good advice! You're right about cars being stored 6 months at a time with no ill effects. We do that with airplane engines, but that requires them to be 'pickled' (we run them, change the oil when hot, then fill it with preservative oil, run that a little bit, and then stick dehydrator plugs in all the spark plug holes, as well as plug up the exhaust and intake manifold, and insert desiccant bags as well.

But I guess nobody really bothers doing that with cars.

And I suppose a failed battery would be covered under warranty...and if it's gonna die, it's going to do it well within the warranty period.

I asked if the dealer would throw in an oil change, but not gonna happen. Given that the offer is a 20% discount off MSRP for a new 718CS with 180 miles on it, I see where they're coming from.

I guess I could just pay for a full service (oil change, brake flush, etc) and rely on Porsche to replace the battery under warranty if it dies.

The only thing I wonder about is internal rust on the cylinder walls. This may well be due to the fact that while I am intimately familiar with air-cooled piston aircraft engines (which can develop cylinder wall rust after as little as 3 weeks of inactivity -- I've seen it myself), I am by no means very familiar with modern liquid-cooled car engines...
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