Spotted my tyres (scorpion zero’s on 19” rims) were bit low on air today so pumped them up as per the door sticker, 33psi front, 36 rear.

Out of interest, do you all stick to the factory recommended psi for daily driving or do some of you like to run your cars softer or harder? Guess aside from running a very low psi fuel economy won’t change much - if at all?

My car will rarely carry much weight incase that makes a difference to how I should set it up.

Thanks in advance and hope you are all well.

Kit

Stock for me. Tried +10% and it just made the ride harsher. 2012 TDV8 Vogue (L322)

Always run at the light load pressure - very very rarely 5 on board with all the luggage. I learned this with a RRC back in the 80’s running at 28 all round made a massive difference to comfort 2021 L405 Vogue SE 4.4 V8 DIESEL ~ #17

Thanks. I am going to try the stock setup for a while and see how I go. The lightest on the sticker is 33f, 36r.
However in time if I did want to experiment to gain more comfort I am guessing the rears would have to be higher psi than the fronts on an L322? Guessing 30f, 33r would be a starter for 10.

I wouldn’t go under stock pressure as you will compromise handling and wear. 2012 TDV8 Vogue (L322)

Usually 34 all round. No appreciable wear and handling OK. Running on Nexen Rodians for last 9 years. Previous cars:
S-Max 2007-2013 (only diesel I've had, good car but expensive when diesely bits go wrong, so what's the point?)
Galaxy 2001-2007
Mondeo Estate 1997-2001
Sierra Estate 1993-1997
Uno Turbo 1987 -1993
Fiesta 1984 - 1987
Fiat 127 1982 - 1984

I have taller walled tyres on my 20's (l322) would I keep the standard pressures, or go higher, or lower? for road cruising... (275 50 20)

Try standard and adjust based on feel - harsh ride and sharp, light steering and it’s too high. Wallowing ride and vague heavier steering and it’s too soft. I’ve got 255/55 20 and run 33/36. Higher pressure at the rear recommended for stability and bias to under rather than oversteer. 2012 TDV8 Vogue (L322)

Thanks.

I have a Michelin 12v digital pump, guessing it’s not 100% accurate so have invested in a draper pressure gauge. Interested to see how different the readings are once it arrives.

There is a difference between cold standing and using, what surprised me is all four tyres will change pressure at different rates
We are talking about a difference of 1 or so overall. Filters are in fact so good that in certain circumstances, when the ambient air is already polluted, a diesel car will tend to extract more particles from the air than it emits. Emissions Analytics worked with........etc etc

He who dies with the most toys wins...

Deleted Filters are in fact so good that in certain circumstances, when the ambient air is already polluted, a diesel car will tend to extract more particles from the air than it emits. Emissions Analytics worked with........etc etc

He who dies with the most toys wins...

Deleted Filters are in fact so good that in certain circumstances, when the ambient air is already polluted, a diesel car will tend to extract more particles from the air than it emits. Emissions Analytics worked with........etc etc

He who dies with the most toys wins...

All tyre pressures on cars are set and measured cold. Likley also why the fronts on the L322 are lower pressure is that in use ) (higher load) they will inflate higher than the rears. 2012 TDV8 Vogue (L322)

I only check tyre pressures when the cars been sitting for a while and at night when the temp is more even around each wheel. Now I have ordered a more accurate gauge I will test all the tyres after a long run to see how much inflation that has occurred, I would guess 2/3psi after a motorway run? More likely on the front than the back as mentioned above. 2009 pre-facelift 3.6 TDV8.

Hot tyre pressures checking would be useful when combined with an infra red thermometer to get the pressure vs temp and identify any issues like a binding calliper or wheel alignment errors causing scrubbing. 2012 TDV8 Vogue (L322)