2014 Nissan Altima tire pressure

Tire: 235/45 R18. How many psi will my tire pressure increase from cold to hot?

Not enough for you to worry about .

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Agreed. Just fill it to the recommended pressure and check it every so often, say monthly.

It depends on your driving. At worst, it will be 3 psi.

On my car I usually see around 3 PSI.

Why do you ask?

After over inflating my tires, the service manager at my dealership said the tire pressure could raise 8-10 lbs. I didn’t believe him.

… and you were correct to not believe him.

In my neck of the woods, tire pressure drops 3psi from the afternoon to the next morning