Unfortunately its a symptom of modern society - fewer and fewer people are cautious and pre-empt problems by checking things - they wait until the proverbial **** hits the fan and it breaks until they do something about it. Forgetting the obvious safety impact if this applying to cars specifically (bald/cracking/pierced tyres, shot brakes, etc etc), but either putting off doing something about it until it becomes a major issue will inevitably hurt you far more financially.
You have to ask how the owner of that car didn't notice their steering being as light as a feather either - I (and am sure many BRers) can tell the difference between just 3-5 (possibly less) psi in tyre pressures, but 12-15!! C'mon mate!
I too was (for once) mystified by HJ's response when he implied that recommended tyre pressures are those when the tyres are warm (in use), as I too was always told to adjust/take tyre pressures when my car's tyres were the same temperature as ambient, preferably out of direct sunlight in cooler conditions. It would be interesting to see if any manufacturers' (handbooks or directly) states at all under what conditions tyre pressures/inflating tyres should be undertaken in and what the norms relate to.
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