Been over inflating tires by 4 pounds for many years. 😁
Been over inflating tires by 4 pounds for many years. 😁
Been overinflating my tires by much more than 4 PSI for decades. I've never had a problem with unusual tread wear, though that may be in part due to the fact my cars' tires tend to be relatively narrow width. (Never had a car with wider than 185's.)
I don't think it's going to be that big an effect. Mythbusters ran a test (admittedly not the most scientific) and found:claims that he can get an extra 3-5 litres per 100 km
Control, 35psi (manufacturer recomendation)
tyres at 10psi = 3.7% increase in consumption
tyres at 30psi = 1.2% increase in consumption
tyres at 40psi = 6.2% decrease in consumption
tyres at 60psi = 7.6% decrease in consumption
https://ecomodder.com/forum/showthre...ure-17151.html
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View my fuel log 2015 Micra S manual: 5.0 L/100 km ... 56.5 mpg (Imp) ... 20.0 km/L ... 47.0 mpg (US) ...