There are many threads on this topic, but I cannot find an answer to my question, so here goes;

We have a 2010 MCS with 17" non-rflats (215/45/17 Falken FK 452)

For the S model the manual lists 33 psi for the 16" and 38 psi for 17". Why the 5 psi difference when the non-S shows 33 psi for both 16" and 17" and it's only about 100lbs lighter than the MCS?

Also the pressure given in the manual is for a fully loaded car (four persons and luggage).

I've been going with 33 psi all around with one or two in the car and it's been great. I pushed up the psi to 36 once and wow, what a difference. Not is a good way, so I can't imagine having to go with 38 psi if the only concern here is fuel economy.

 

Good question. I run my 17 inch non-rf around 36 and have no complaints.

 

I have been using 36psi in my non-runflat 215/45/17 Michelin's and have not had them on long enough to see if the center is wearing faster then the outer edges. I would think that 32 or 34 psi would be proper inflation for the weight of the Mini but even my tire store does not have an answer. They just go by whats marked on the door when they inflate tires.

It sure would be nice to know if 32/34 psi would be safe to run in these tires.