What percentage of 20 year old cars are on the road?
I should have been a little clearer. I am sure RL Polk & Co. has
amassed the registration data for all the US into a huge database. RL
Polk is in the buisness of selling this information. Ads claiming
longevity often reference RL Poolk data as the source of the claim,
but I can't access the raw data without paying for it. I was hoping
there was an open source (i.e. free), possibly a simplified version,
available to the public. Without being to actually see the data, it is
hard to know how to treat the claims based on the data. I once wrote
Chevy and asked about their claim that Chevy makes the longest lasting
most reliable trucks. All they said was that it was based on RL Polk
registration data for a particualr period. Of course without actually
ahving access to the data, I can't see how the claim means anything.
Even worse, even if I had the raw registration data, I doubt it is
meaningful unless you also know how the trucks were actully used. I
always assumed that a higher percentage of Chevy trucks were purchased
by suburban users than was the case for Ford (i.e., more Fords were in
commercial use / farm use / fleet use), and therefore the Chevy trucks
were more liekly to be gently used, better cared for, and used less,
so therefore registration data byear alone would tend to suggest they
lasted longer... which might not really be true for vehicles used in
the same manner by similar populations of users.
I guess the old statement that "Figures don't lie, but liars figure"
sums up the problem with claims made based on RL Polk registration
data. I've always assumed that manufacturers actually have good data,
but that they have no intention of publishing it. No manufactuer
builds perfect vehciles, and if they start putting out the good data,
sooner of later someone is going to demand to see the bad data as
well, and use a lawsuit to pry it out into the open. Better to make
unverifiable claims based on third party information that can be
checked but don't actually prove anything.
I am 100% sure that Toyota is telling the truth when they say 80% of
the Toyotas sold in the last twenty years are still on the road. I am
also certain that it is virtually a meaningless statement, but that it
sounds like it means something important. It is the perfect sort of
marketing claim - true, verifiable, and easily missunderstood to be
more significant than it is. At least that is how I see it.
Ed
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