In the pursuit of better MPG I have been running the tires at 56/54 psi. Recently I got a nail in the tire and had it patched at a gas station. (It was a very slow leak and thanks to the TPMS otherwise I won't notice it.) Can the patch hold the 56 psi? Thanks!
The patch would be more likely to fail at low pressure, but you should not run your tires above the manufacturers recommended max pressure.
Mike I think your reply is a little ambiguous, are you talking about Toyota's recommendations or the tyre manufactures recommendations two very different numbers.
Keep in mind your "pursuit of better MPG" also reduces the size of your tire's contact patch. You'll have less traction, increase your stopping distance, etc. Is saving a few $$$ worth sacrificing your safety?
Britprius, Sorry for the ambiguous reply. Tires should be run at the Max pressure recommended by the Tire manufacturer or no less than 90% of max. IE: Max 44psi tire should be run at no less than 40psi. Different tire manufacturers will have different Max pressure ratings even on the same size tire due to sidewall and tread variations, and tread composition. Over inflating a tire will cause uneven wear to the center of the tread and under inflation will cause uneven wear to the shoulders of the tire. Yes over-inflation will help you achieve higher mileage, this is because there is less tread contacting the ground giving you less resistance, but this is at the expense of reduced traction and tire longevity. I hope this clears up my reply.
