What's the consensus on the best tyre pressure please? ...comfort biased.. but don't want to wear the tyres out unnecessarily .Also what mileage should I get out of them . We seem to get all Dunlop's here in Australia not the Michelins the US cars come with ....

 

I do the recommended 33 psi.

 

I have the Michelin and am trying 34 psi (cold tire) this summer. Have the 20"x55r and do not notice any better or worse mileage than running 32 psi last summer. Ride is the same and tire wear seems to be even across the tread. I would not put too much hope that any OEM tire will last as long as they are rated for.

 

I've never found a good reason to deviate from the manufacturer's recommendation.

 

usually they are way too soft and your tyres wear out in no time ......

 

Are you saying that the recommended tire pressure 33 psi front and rear in the 18" or the 20" tire is too soft??
What pressure are you running and if it is higher than standard do you notice any difference in the ride??

 

I haven't got my 350 yet but have been driving a loaner RX 200 t from the dealer and it has 35 which seems fine ... 33 for a large heavy car will wear out the edges of the tyres from my previous experience so just wondering what most people were using ? 😊

 

When I run mine at 34 psi (cold) they heat up to 37 psi according to the tire pressure monitor. I get even tread wear, no unusual wear, just the predictable wear from an OEM tire. I would not expect to get the kind of mileage from an OEM tire as a replacement. The Michelin's are an XL tire and am guessing so are the Bridgestone and Dunlop

 

I always run a few psi higher than recommended sticker (36in the rx) Those numbers are usually a compromise on ride quality and mpg efficiency. I'm willing to sacrifice a little ride Q for a mpg bump. Tire wear is fine too and I rarely have more than myself in the car from a load perspective.

 

According to the EPA, a 1psi drop in tire pressure decreases gas mileage by .4%. Thus 20 mpg would decrease by .04 mpg, I assume increasing pressure by 1psi would result in equivalent improvement in mileage. 20mpg would increase to 20.04 mpg. Don't know how linear pressure drop or increase is to mileage change. Looking at such small numbers I personally see no reason not to follow manufactures recommendations.

 

Just a correction on your math. A .4% increase from 20 mpg would raise the mpg to 20.08 mpg, not 20.04 mpg.

 

.4% = .004

 

Right. I misplaced the decimal point. if the increase in mpg was .4%, the increase from 20 mpg would be to 20.08 mpg, not 20.04 mpg. I corrected my earlier post by putting the decimal point in the right place.

 

I made a typo in my post. The EPA number should be .2% and not the .4% as stated. Therefore my numbers are correct.

 

What's the recommended again?

I remember that the costco tire guys always told me to ask for 4+ above the recommended because when you get to the tire place, usually your tires are already warm.

This is COLD tire recommended pressure correct?

Also a lexus service rep always told me to add 2 to 3 psi extra to save a trip for coming just to fill air since we lose air with heat/cold