This came from the president of the Canadian Auto Museum, Jack Innes, who was kind enough to write this to me:
"Hello Steve,
This sounds like an interesting project.
Storage of a late model car presents many problems that are not there with an antique.
There is a tremendous amount of plastic & synthetic material in the car that seems to
have a timed point of self destruction. The electronics also will need preservation
& some degree of ongoing support. I am not conversant enough on the electronic system
to advise you in detail on its preservation. I do know there are systems available that
will supply the current necessary to keep the computer from loosing its memory, some
of these plug in to the cigarette lighter. It might be wise to have a dealer check the current
configuration of your computer since the software relating to a 2005 car will soon be
unavailable. I do not know if the settings could be stored on a disk for future reference
but it would be worth investigating.
It might be wise to order replacement parts for all of the sensors & possibly even a
computer for the car while they are still available. Most of these are very proprietary
to the individual vehicle & could be a major problem to deal with at the end of the 20
year period. These should be sealed in individual containers with desiccant if possible.
The ABS controller would also be a difficult part to service or find years down the road.
It is unwise to start a car in storage unless you are willing to run it up to full operating
temperature. It is much better to turn the engine over a few revolutions every few
months to distribute the oil.
The tires will become unsafe as time goes on & there is very little that will save them. It
probably would be best to maintain the pressure & leave the car on its wheels. Putting it
on stands could put irregular stress on the suspension. AVOID products like Armorall
that contain silicone! These are very destructive to plastic & rubber.
Remove all gasoline & put in a small amount of lower octane, alcohol free aviation gasoline with a stabiliser
added then run the car for at least half an hour to purge as much of the alcohol based fuel
from the injector pumps, etc. Running the system dry may cause seals to dry out over time
& would not be advisable. It might be wise to find a competent marine mechanic with training
on preparing modern fuel injected engines for winter storage. He could advise you on the best
fuel, stabiliser & procedure to use.
The oil should be changed now since it will have developed some acids & condensation. In
static storage it should be changed every few years for safety’s sake.
The ph of the antifreeze can be checked from time to time to see that is has not changed to a
substance dangerous to the aluminum parts of the engine.
The brake fluid should be changed every few years as well since it can absorb water & cause
severe damage. This should be done by someone familiar with the system since it is very
difficult to bleed air from many modern ABS brake systems. ( Rolls Royce suggests changing
the brake fluid once a year on their cars.)
A storage tent such as the one described here would be very good;
http://www.carcapsule.com/ .
I add this link as a reference only, I know nothing about this particular company but I have seen
such tents & they look like a good idea. The humidity can be controlled in such a situation. A
constant RH of 40 to 60% is desirable.
I had a very bad experience with a nice soft cloth car cover on my 1927 Rolls Royce. The cover absorbed
moisture from the air over winter & subsequently caused the paint to lift from the top of the hood. A car cover
is not a solution to good storage!
Ultraviolet radiation from sunlight and fluorescent lighting is very destructive & should be avoided.
You mentioned the “wrapper” on the car. If this is the plastic sheeting I have seen stuck to the body
panels of some vehicles in shipping, I would investigate how it is affecting the paint. It is meant
to be used for a very short time & may be destructive over the long term.
As I mentioned earlier, avoid Armorall & compounds containing silicone. In reality, the car sounds to
be as new & should only need dusting & if necessary plain water to keep it clean. Once in a tent it
will not be exposed to dust & should remain clean.
I am sure there are many more things to consider but hopefully this is of some help.
Jack Innes
President, Canadian Automotive Museum"