[Vindicator3]

I've never had a car where the tires got all that old before wearing down the tread, but my daughter the student puts far fewer miles on her car.

Her tires are 6 years old and still have decent tread depth, but she's being told that new ones may be in order just due to age of the rubber. They are quality Michelin tires, not an el cheapo special.

Any thoughts from those of you who know way more than I do about this sort of thing?

Thanks!

[Mech Spec]

Car parked outside a lot? probably good reason to look for new ones if so but you could probably wait for a deal to come around.

[tturedraider]

Six years is the age where tire folks are going to start saying new tires are needed. I say if the rubber is not showing physical signs of deterioration you can probably go another two years at least. Does she have to drive on long road trips? That would be a reason to consider swapping now.

[DanG]

Michelin says tire life is a maximum of 10 years from manufacture date. https://www.michelinman.com/auto/aut...need-new-tires

[NSXR]

Originally Posted by Vindicator3

...but my daughter...

What's the price of a potential accident? Much higher than the cost of new tires IMO. 6 years is the standard for a reason. Not 3, not 7, etc, but it does depend a lot on condition. I would inspect them for any sort of cracking, but in the absence of cracks I would still replace them for my daughter.

Originally Posted by Mech Spec

Car parked outside a lot? probably good reason to look for new ones if so but you could probably wait for a deal to come around.

Excellent question, and I concur.

[Humdizzle]

i would change them out.

you can also go 15-20k between oil changes depending on how the car is driven. but its not good practice.

[Vindicator3]

Thanks all!

[afadeev]

Originally Posted by Vindicator3

I've never had a car where the tires got all that old before wearing down the tread, but my daughter the student puts far fewer miles on her car.
Her tires are 6 years old and still have decent tread depth, but she's being told that new ones may be in order just due to age of the rubber. They are quality Michelin tires, not an el cheapo special.

Your daughter is being scare-mongered by a tire salesman.
Most tire shops will aim to clear inventory before tires get 6-years old, but even that is somewhat arbitrary and depends on how they were stored.

Originally Posted by Vindicator3

Any thoughts from those of you who know way more than I do about this sort of thing?

Tire degradation due to age is very environment dependent. There is not a magic "fall off the cliff" date, but some time after 10 years you might want to get going on a replacement.

Usually, the sidewall will show signs of cracking, or the tread blocks will start chunking off as a sign of rubber degradation.
Either that, you the tire sidewall letters spell "Pirelli", in which case, you should probably replace them ASAP.

https://www.tirerack.com/upgrade-gar...3xALN5-HwccPX8

Originally Posted by NSXR

What's the price of a potential accident? Much higher than the cost of new tires IMO. 6 years is the standard for a reason. Not 3, not 7, etc,

There is no such "standard"!

HTH,
a

[dgoldenz]

Originally Posted by afadeev

Your daughter is being scare-mongered by a tire salesman.
Most tire shops will aim to clear inventory before tires get 6-years old, but even that is somewhat arbitrary and depends on how they were stored.



Tire degradation due to age is very environment dependent. There is not a magic "fall off the cliff" date, but some time after 10 years you might want to get going on a replacement.

Usually, the sidewall will show signs of cracking, or the tread blocks will start chunking off as a sign of rubber degradation.
Either that, you the tire sidewall letters spell "Pirelli", in which case, you should probably replace them ASAP.

https://www.tirerack.com/upgrade-gar...3xALN5-HwccPX8



There is no such "standard"!

HTH,
a

Considering some (all?) manufacturers won't CPO a car with 6 year old tires, it's not just a scare tactic to get you to buy new tires. It's a legitimate safety issue. Tires are the only thing that connects you to the road, don't be cheap.

[NSXR]

Originally Posted by afadeev

Tire degradation due to age is very environment dependent. There is not a magic "fall off the cliff" date, but some time after 10 years you might want to get going on a replacement. Usually, the sidewall will show signs of cracking, or the tread blocks will start chunking off as a sign of rubber degradation.
Either that, you the tire sidewall letters spell "Pirelli", in which case, you should probably replace them ASAP.

Not all types of degradation can be seen with the naked eye. Are you willing to risk your daughter's life on something you can't see?

Originally Posted by afadeev

There is no such "standard"!

I think a quick search will tell a different story, but hey, you do what you want, it's your life. Unless the conditions are perfect, and I mean absolutely perfect, there is no way I'd keep a set of tires for 10 years. It's simply not worth the risk.

[tturedraider]

Originally Posted by dgoldenz

Considering some (all?) manufacturers won't CPO a car with 6 year old tires, it's not just a scare tactic to get you to buy new tires. It's a legitimate safety issue. Tires are the only thing that connects you to the road, don't be cheap.

Interesting datapoint you chose. What manufacturers are you aware of that CPO any of their cars that are six years/72 months old? BMW doesn’t CPO cars over five years/60 months old and I’m not aware of any others that CPO cars older than five years.

[afadeev]

Originally Posted by dgoldenz

Considering some (all?) manufacturers won't CPO a car with 6 year old tires

What are your sources, for some (all?) of the manufactures you are citing?

I've looked up BMW CPO requirements, and the tire section only references tread depth, not tires' age:
https://www.bmwusa.com/content/dam/b...1881317958.pdf

Originally Posted by dgoldenz

Tires are the only thing that connects you to the road, don't be cheap.

True 'dat.
But also, don't be silly and wasteful.

Originally Posted by NSXR

Not all types of degradation can be seen with the naked eye. Are you willing to risk your daughter's life on something you can't see?

Scare mongering much?

OP's tires are made by Michelin. Another poster referenced (and I'm re-linking) Michelin's official position on its tire longevity:
1). After 5 years or more in use, your tires should be thoroughly inspected at least once per year by a professional.
2). After 10+ years after their date of manufacture, as a precaution, Michelin recommends replacing them with new tires.

Any other opinions are pure speculation for speculation's sake.

Originally Posted by NSXR

I think a quick search will tell a different story, but hey, you do what you want, it's your life.

It's the responsibility of the party making extraordinary claims (like you are doing) to furnish the evidence to back them up. Not the other way around.

Originally Posted by NSXR

Unless the conditions are perfect, and I mean absolutely perfect, there is no way I'd keep a set of tires for 10 years. It's simply not worth the risk.

Michelin says otherwise, but what do they know, right?

What should we all do - follow advice of the tire manufacturer, or some internet strangers?

You decide!

HTH,
a

[XutvJet]

Originally Posted by tturedraider

Interesting datapoint you chose. What manufacturers are you aware of that CPO any of their cars that are six years/72 months old? BMW doesn’t CPO cars over five years/60 months old and I’m not aware of any others that CPO cars older than five years.

I bought my 2011 Porsche Cayman with 67K miles CPO'd by Porsche Colorado Springs in October 2022. It was nearly 12 years old at the time. It did come with new Pirelli P Zero summer tires which are far and away the worst summer tire ever made.

[XutvJet]

If the tires aren't showing signs of degradation, I wouldn't bother replacing and go another 2 years or so. I put this right up there with changing out brake fluid every 2 years. Inspect and test it. If you did, you'd see that brake fluid usually tests fine even after 4 years.

[Grease23]

Ford has long recommended replacing tires at 6 years, regardless of mileage.

[BWBike]

My tires are 10 years old on the Challenger; I already bought 2 and will put them on this weekend. I already changed them on the 10 years old Jeep.

I don’t want a blowout. Why take a chance.

[Portimao Blue M440ix]

Not sure what I would do if it was my daughter's car but the manufacturer Michelin has their recommendations and they would know better then me. We all have our personal opinions but we all do what makes us sleep best at night.

[dgoldenz]

Originally Posted by tturedraider

Interesting datapoint you chose. What manufacturers are you aware of that CPO any of their cars that are six years/72 months old? BMW doesn’t CPO cars over five years/60 months old and I’m not aware of any others that CPO cars older than five years.

Ferrari
Porsche
McLaren
Rolls Royce
Bentley
Ford
Toyota
Honda

I know for a fact that Ferrari Porsche and RR all have tire age requirements, pretty sure Ferrari is 4 year old tires max. My 458 had 4 year old tires and had to be replaced prior to CPO. I would suspect the others won’t CPO a car with 10 year old tires either.

[tturedraider]

Originally Posted by XutvJet

I bought my 2011 Porsche Cayman with 67K miles CPO'd by Porsche Colorado Springs in October 2022. It was nearly 12 years old at the time. It did come with new Pirelli P Zero summer tires which are far and away the worst summer tire ever made.

Curious. Was that a Porsche factory backed warranty or a dealership backed warranty? Would any Porsche dealer in the United States honor the warranty? I could not find clear information on Porsche’s website regarding the limitations of issuing their CPO warranty, but everything I did find said it was only in effect for two years after the new car warranty expired.

Originally Posted by dgoldenz

Ferrari
Porsche
McLaren
Rolls Royce
Bentley
Ford
Toyota
Honda

I know for a fact that Ferrari Porsche and RR all have tire age requirements, pretty sure Ferrari is 4 year old tires max. My 458 had 4 year old tires and had to be replaced prior to CPO. I would suspect the others won’t CPO a car with 10 year old tires either.

Ford gives a 139 point inspection on vehicles over six years old. Toyota gives a 12 month/12,000 mile powertrain warranty on vehicles over six years old. Honda gives a 100 day/5,000 mile warranty on vehicles over six years old.

I don’t care enough about what Ferrari, McLaren, Rolls Royce, or Bentley do to bother checking.

[Topcarbon]

one other thing that breaks down over time are the bands on the sidewall. You cannot see the decomposition and these are sensitive to time. when they do breakdown, you get a weird drift as if out of alignment.
I would say if you do not drive in cold conditions or extreme heat, 6-8 years is ok.

[dgoldenz]

Originally Posted by tturedraider

Curious. Was that a Porsche factory backed warranty or a dealership backed warranty? Would any Porsche dealer in the United States honor the warranty? I could not find clear information on Porsche’s website regarding the limitations of issuing their CPO warranty, but everything I did find said it was only in effect for two years after the new car warranty expired.




Ford gives a 139 point inspection on vehicles over six years old. Toyota gives a 12 month/12,000 mile powertrain warranty on vehicles over six years old. Honda gives a 100 day/5,000 mile warranty on vehicles over six years old.

I don’t care enough about what Ferrari, McLaren, Rolls Royce, or Bentley do to bother checking.

Yeah, and I’ll bet you none of them will certify a car with old tires on it. Nothing you posted contradicts what I said, and the Porsche warranty is backed by Porsche and can be used at any dealer. I guarantee you they will not certify a car with old tires. Call a service department yourself and ask.

You asked which manufacturers will CPO a car older than 6 years so I told you the answer. Whether you care or not has no bearing on the facts. There is a reason these manufacturers will not certify a car with 5-10 year old tires on it. Aston goes up to 10 years old for certified cars too and they also won’t CPO one with old tires.

[tturedraider]

Originally Posted by dgoldenz

Yeah, and I’ll bet you none of them will certify a car with old tires on it. Nothing you posted contradicts what I said, and the Porsche warranty is backed by Porsche and can be used at any dealer. I guarantee you they will not certify a car with old tires. Call a service department yourself and ask.

Sorry, I don’t call a powertrain warranty a Certified Preowned.

Since you’re not the person who posted that he bought an eleven year old Porsche with a CPO warranty, please post definitive information confirming Porsche will provide a factory backed CPO warranty on one of their vehicles that is more than six years old. As I mentioned, everything I found published by Porsche indicates their factory backed CPO warranty only lasts for two years beyond the end of the new car warranty, which effectively means they don’t CPO vehicles older than six years. They just don’t specifically state whether they offer their CPO warranty on vehicles older than six years.

Any Tom, Dick, and Harry Motors can claim they have CPO’d their cars and offer a “warranty” that is actually only good at their specific dealership. In the United States an actual CPO warranty is known as a warranty backed by the manufacturer that can be used at any franchise brand dealership in the country.