New 2012 33 miles getting only 30mpg???

[egads]

On the sidewall of the tire. The sentence will read something like: max load xxxxlbs. (xxxxkg) at xxlbs (xxkg) maximum pressure.

the factory recommended is 33lbs. I run ours at about 38. Some folks here go higher. Remember that these reading are stone cold. Best to get a small compressor and do it at home in the morning. (I use a little nail gun compressor, but have used a cig lighter plug one in the past) I do not live where it's cold so my pressures don't vary unless a curb has been hit or a service guy lowers them to spec.
If you live where it gets cold, you have to raise them as winter sets in and lower them in the spring. Often times incrementally each way.

[jc2bg]

Tire pressure max rating on my factory (2013) Bridgestone M-S is 40 pounds. I was somewhat amazed to find that off the dealer lot, in less than 20 degrees F, these tires were inflated to 50 psi all around. Suits me, however, as the fuel economy so far has been excellent, and I very much enjoy the way the car handles. The ride is firm, but not uncomfortable--kind of sporty feeling to my sensibility--and it corners like a racehorse.

[RedDevil]

Originally Posted by charliez

How do I find the max sidewall pressure information?

To be fair I did not find it on my Conti WinterContacts, but was crouching in the dark and snow so did not look too well. Just assume it will be somewhere on it.

I use just under 3 bar (44 PSI) all round on my 175/65/15 winter tyres, but may go a bit higher even. It was 2 bar when I got them, which is below spec.
It did have a real effect on mpg (over 5%); got personal record mpg on some trips under worse conditions than previous runs.

The Honda electic pump is impossible to attach or detach without leaking some air, so you never know exactly how much pressure you really started with or ended up with, unless you get a steady hand at it.
At pressures around 3 bar I lose .1 bar by either detaching or attaching; I inflate to 3.1 bar and find 2.9 left when reattaching directly afterwards, due to leaking air while turning the screwy ring.

[charliez]

I got it inflated to 35psi and got a little boost, and at 40psi got to 40mpg now. Happy happy happy