[ShocknAwe]

I replace my tires every 4-5 years if it's a commuter all seasons just wear so slowly. My 1er eats tires so I typically cord them out before I notice, every 1-2y. My cars spend a lot of time outside and tires are exposed to full range of temperatures including lots of heat cycles. Not worth the risk damaging a set of 4-8k wheels when tires are so cheap by comparison.

Haven't had a flat i couldn't fix with a quick DIY plug in my own garage since being proactive.

[dgoldenz]

Originally Posted by tturedraider

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.

You couldn’t be more wrong but ok. The Porsche CPO warranty is two years from date of purchase and you can add a third year for extra $2500-4000. I’ve bought several of them, and they will not CPO a car with old tires, period. A simple google search would answer your question.

[tturedraider]

Originally Posted by dgoldenz

You couldn’t be more wrong but ok. The Porsche CPO warranty is two years from date of purchase and you can add a third year for extra $2500-4000. I’ve bought several of them, and they will not CPO a car with old tires, period. A simple google search would answer your question.

Attachment 3734442

That’s an impressive age range. I don’t put a lot of stock in Google AI overviews, which is why I posted information directly from the manufacturers’ websites. But, most Porsche dealer websites show the 13 year/124,000 mile range. I still find it interesting that nothing Porsche publishes directly provides this information. It appears they actually extended the range at some point, because numerous dealers’ websites show 8 years/100,000 miles as the limit on the short blurb that is displayed on Google, but then when you click the dealership link it shows the 13/124k information.

[BeEmVe]

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.

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

I will assume the car is outside. And hopefully your daughter regular checks the tire pressure (regardless if equipped with TPMS) and the tires are regularly rotated with a proper alignment.

As such UV as well as oxygen are two factors that cause degradation (apart from driving). My suggestion based on Michelin's and other guidance would be to run them for a couple more years while regularly inspecting the tires.

For reference, my spouse's buggy does not have many miles. It lives in a garage. It has summer and winter shoes. Both are at the 10 year mark. We are running both one more season as there are no visible signs of degradation.

[T.R.S.]

It's somewhere between the science and the scare tactics.

"You'll die if you drive out of here without a new set of tires. And you're in luck, I can give you a great deal! You don't really want to die, do you?"

[BroDoze]

Family member’s old-ass Subaru Forester had 6yr old tires we just replaced. Michelin Defender all-seasons. They had microcracking all over the tread and sidewalls.

Car’s always parked outside in the elements and constant massive temp swings of CO at 6,800ft. The sun is not nice to outside vehicles up here.

I truly believe this 6yr recommendation is a safe “average” based on the entire range of extremes - from temp-controlled garage queen to always outside in harsh climates. 6 years, in this case, was probably a year overdue.

I’ve never had a set last much longer than 3 years on my vehicles - even the GQs - I wear em out or sell the vehicle before they need replacing.

[M3Sleeper]

It's your daughter get new tires it can't cost that much to be 100% sure she's in good shape in rain, or bad conditions. She will have more traction and can stop faster on fresh tires most likely they are less likely to blow out and get a flat leaving your daughter stranded.

If it's your own car you could ride them out...not for your girl no matter her age shes worth more than anything.

Dad over here if you can't tell.

[chassis]

Age-related tire failure and dry rot is real.

My son’s rarely-driven MQB Tiguan had 4 year old tires when one delaminated and experienced total tread loss on the highway. The day prior I washed his car and noticed dry rot cracking and was going to suggest tire replacement “soon”. Soon turned out to be the next day!

[slilley]

I'd agree with others here that 6 years is probably a little premature - as long as more than half of the tire tread remains (so at least 3/16" tread depth). If she's below that tread depth, that would be the justification I'd use to replace them. Otherwise, she's probably fine for another year or two.

Definitely replace any tire before it's 10 years old. When I got my first 911 from it's 75-year-old original owner, it's factory-installed tires were 8.5 years old. I autocrossed the car a couple times on those old tires, but they had definitely aged-out by that time - offering not much grip compared to new tires. Still a ton of fun, however! But the tires do harden with age, and by 10 years they are always overdue for replacement.

[XutvJet]

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.

Yes, full Porsche CPO for 2 years.

[XutvJet]

Everyone keeps talking about "blowouts" but seriously, how many of us have experienced a blowout? I have never experienced one in my 30+ years of driving, my wife hasn't, and none of my close friends. The only people I know and/or have read about on the forums that have experienced blowouts are those with runflats hitting big potholes which tears the sidewall. If I had a car with low profile runflats, I'd definitely be worried about blowouts as it seems fairly common.

[Mech Spec]

Originally Posted by XutvJet

Everyone keeps talking about "blowouts" but seriously, how many of us have experienced a blowout? I have never experienced one in my 30+ years of driving, my wife hasn't, and none of my close friends. The only people I know and/or have read about on the forums that have experienced blowouts are those with runflats hitting big potholes which tears the sidewall. If I had a car with low profile runflats, I'd definitely be worried about blowouts as it seems fairly common.

There was that one guy who claimed he had a blowout after he hit a curb one summer tires in the winter! (who was on the bimmerpost front page and then deleted everything after he got called out)

[tturedraider]

Originally Posted by XutvJet

Everyone keeps talking about "blowouts" but seriously, how many of us have experienced a blowout? I have never experienced one in my 30+ years of driving, my wife hasn't, and none of my close friends. The only people I know and/or have read about on the forums that have experienced blowouts are those with runflats hitting big potholes which tears the sidewall. If I had a car with low profile runflats, I'd definitely be worried about blowouts as it seems fairly common.

I had one on my right rear tire, fortunately, when I hit a large rock on the interstate about 40 years ago. It knocked a hole in the sidewall.

[Tambohamilton]

Follow the manufacturer; their guidelines will be conservative, otherwise they'd have serious legal problems.

And if you're not regularly inspecting the only thing that holds you on the road regardless of age, I'm sure there's a Darwin award waiting for you.

[BlkGS]

I didn't read the whole thread because I'm sure most of it is garbage anyways.

As tires age, they get stiffer. That means less grip. In a commuter car not driven aggressively, that's probably not a big deal. In a performance car, it's just limiting how much grip you have available. Older tires will NOT blow out randomly. They are not love grenades with the pin pulled. They're just worse grip than they were new.

[Vindicator3]

Re a couple of the questions - Yes the car has always been parked outside and yes the tires are well maintained in terms of rotation and inflation. Dry rot is the issue if there is an issue. I've asked her to look for microcracks or crumbling, etc., and am waiting for a report back.

Re "who's had a blowout," I actually have. Probably 1989, give or take a couple of years, on the POS '76 Buick I had at the time. Left rear blew out on the interstate with my gf (now wife) in the car, didn't have any problems controlling the car and pulling over. Changed the tire and went on my way. Good times.

[NSXR]

Originally Posted by BlkGS

Older tires will NOT blow out randomly. They are not love grenades with the pin pulled. They're just worse grip than they were new.

Forgive me, but you can't say this at all. What a tire will do under a certain set of circumstances depends on many things, and they can absolutely blow out randomly depending on the conditions. I'll grant you that most tires mile-out before they condition-out, but that's usually due to owners not getting proper annual alignments, but that doesn't mean that blowouts don't happen, because I can assure you that they do.

[No one]

Old tyres are made to last. They are time tested. Like this:

. You can also brake the rotten floor of your old car and connect yourself with your dear road using your feet if you need that.

I would wonder if daughters appreciate a new set of tyres not installed on a new car. Is another six to ten years with the old shitbox an encouraging perspective or are they not that smart for their good (they are supposed to obtain a car themselves in that time range)? Boys should favour girls with new cars, especially if they don't have those!

If the tyres aren't worn out, show no sign of deterioration and you are not looking for a better performance (which is not necessarily the case with newer things , mind tyres take a run in at least ) I don't think there's a need to replace them. They are pretty simple and sturdy. Recommendation based on age (well, that age you wouldn't even notice yet) must be a pure marketing here: they want to sell their shit and they expect the fresh to be no harm except for your wallet.

A tyre won't age if you refresh the air in it regularly (a joke).

[Ohio Enthusiast]

If one believes that rubber deteriorates with time and exposure to UV and oxidizers, then it becomes a question of how far is one willing to let tires deteriorate before replacement. 3 years, 6 years, 10 years, 15 years, is just a matter of risk-reward calculation. I personally would follow the 6 year recommendation for more rigorous inspections of the tires and aim to replace the tires within a year or two (waiting for a good deal, for example).

On the other hand, if one believes rubber does not deteriorate with time, I wish them the best with their BMW coolant hoses.

[M5Rick]

It's up to you if you want to replace tires after 6 years, my wider rears are 2-3 YO and the fronts are around 7 and I'm happy to keep the front ones on longer as the rears takes the main stress with the throttle.

[No one]

Originally Posted by Ohio Enthusiast

If one believes that rubber deteriorates with time and exposure to UV and oxidizers, then it becomes a question of how far is one willing to let tires deteriorate before replacement. 3 years, 6 years, 10 years, 15 years, is just a matter of risk-reward calculation. I personally would follow the 6 year recommendation for more rigorous inspections of the tires and aim to replace the tires within a year or two (waiting for a good deal, for example).

On the other hand, if one believes rubber does not deteriorate with time, I wish them the best with their BMW coolant hoses.

You didn't mention how frequently you replace your BMW (if that really matters) coolant hoses just because you believe. I believe tyres are made of a lot sturdier rubber than hoses and yes, I do care to warm up my engine carefully (to prevent any extreme temperature burden on that rubber) as I know cooling is my BMW engine's weak point, in particular (many complained). So far (almost 12 years) so good. No leaks. And I am not a fan of wheelspin, drifting/sliding or hard braking either.

[BlkGS]

Originally Posted by NSXR

Forgive me, but you can't say this at all. What a tire will do under a certain set of circumstances depends on many things, and they can absolutely blow out randomly depending on the conditions. I'll grant you that most tires mile-out before they condition-out, but that's usually due to owners not getting proper annual alignments, but that doesn't mean that blowouts don't happen, because I can assure you that they do.

Blow outs have nothing to do with tire age. Blow outs usually are caused by external forces (ie running over a mega pothole, running over some shit in the road, etc), and less frequently by inferior tires (usually from no name Chinese brands).

Old tires get hard and lose grip. That's it. There's countless little old grannies driving around in 2002 Camrys with the original tires on them without issue.