Originally Posted by Todd
Those are the practices I follow, but I'd still like to know what others do and what results they see.
I start with what the manufacturer recommends. Then make observations on how the vehicle rides, sounds, handles and how the tires wear.
Once I have some miles on it, make adjustments:
- Increase pressure for better fuel mileage
- Increase or decrease pressure because of signs in the tread of over/under inflation.
- Decrease pressure if the ride is too harsh.
Keeping in mind not to exceed the max pressure on the sidewall of the tires.
Eventually, I get the tire pressure "just right". Then the seasons change or the tires have to be replaced and I start the whole process again from where I left off.
My daily driver (2013 Jetta) calls for 38PSI front and 35 rear. The current tires have a max of 44 PSI. 42 has been a nice compromise since April's 50,000 mile service.
My new TT (May 2015) max at 50 PSI. The sticker says 45. So far 45 is nice.
The F350 truck? 80 PSI (max on the sidewall) all the way around. It wallows on anything less.
You've got lots of options. Choose what suits you best within what is safe.