Author Topic: tyre pressure to increase mpg (Read 5663 times)

guest780 · « **on:** February 09, 2009, 06:08:06 PM »

hello. just wanted to know what is the best psi to have my tyres set to.
i have read that the tyre pressure is one of the biggest factors when it comes to low mpg.
i have mine set to 31psi
would like to know what others have theirs set to

Geoffers · « **Reply #1 on:** February 09, 2009, 06:21:08 PM »

Tyre pressures are in the Handbook and should not be varied!
Cops can do you for having under/over inflated tyres!

guest780 · « **Reply #2 on:** February 09, 2009, 06:27:53 PM »

thank you for your advice about the cops. not that it matters.....

RichardA · « **Reply #3 on:** February 09, 2009, 09:20:44 PM »

Are the tyre pressures printed inside the drivers door? (tbh, I can't remember!)

JazzyB · « **Reply #4 on:** February 09, 2009, 10:00:55 PM »

the recommended tyre pressures are on a label on the drivers door frame.

I have the pressures set to the maximum load, that is the one for I think 5 people and luggage, not the one for towing.

That gives max fuel economy.

Years ago when I had a fiesta in the handbook it said for max. fuel economy have the tyres at the max. load setting

Geoffers · « **Reply #5 on:** February 10, 2009, 08:10:06 AM »

Oops!

culzean · « **Reply #6 on:** April 03, 2009, 10:19:19 AM »

Keep the pressures at the recommended figure, over-inflation will 'bulge' the tyre tread, reduce your grip on the road and cause the tyre tread to wear more in the centre than on the outside edges, so the money you save on fuel will probably be partly cancelled out by buying tyres more frequently.

The tyre pressure will naturally go up and down a bit according to the daily temperature anyway, and it will be lower when weather is cold and higher in hot weather due to the air expanding and contracting, but we really can't do anything about this except to check pressure fairly regularly.