Noob question on filling up car tires

[Oblivion]

I have to drive to the gas station to fill up my tires, so they'll be hot. How much do I fill them up to account for that?

Here are the recommended specs for when it's cold:

front: 33 psi
back: 30 psi

[Great Rumbler]

An expert will probably come and shoot me down, but as long as it's near that number you probably won't have any problems.

[Dickie Dee]

ndoor-to-outdoor Temperature Variation. Significant differences between the conditions tire pressures are set (the warmth of an attached garage, heated garage or service shop) and in which the vehicle will be driven (winter's subfreezing temperatures) requires inflating tires 1 psi higher than recommended on the placard for every 10° F difference in temperature between interior and exterior temperatures.

Afternoon Ambient Temperature Increase.* Set 2 psi above vehicle manufacturer's cold inflation recommendations when installing new tires or if the vehicle has been parked in the shade for a few hours.

Tire Heat Generated While Being Driven (or at speeds of less than 45 mph).* - Set 4 psi above vehicle manufacturer's cold inflation recommendations.

Heat Generated While Being Driven Extensively (or at sustained speeds greater than 45 mph).* Set 6 psi above vehicle manufacturer's cold inflation recommendations.

Do Not Release Hot Tire Pressure if any of these variables could be the cause of measured tire pressure exceeding the maximum psi branded on the tire's sidewall by the 2, 4 or 6 psi indicated above for the various conditions. This temporary pressure increase is expected and designed into the tire's capabilities.

*NOTE: Tires on a parked vehicle exposed to direct sunlight will appear overinflated due to the heat absorbed from the radiant energy of the sun. Pressures cannot be accurately set on these tires until all have stabilized in the shade.

[demi]

Are you an engineer?

[Momo]

This is weird shit to think about, and I majored in physics @ uni

[AdmiralViscen]

How far away is the gas station?

[demi]

How fast are you going to the gas station?

[Reb]

If your brother leaves from his house half an hour earlier, and goes twice as fast, where will you meet?

[MCD]

[Mupepe]

Just fill it to the rated amount.  No one worries about that except the aspy engineers who designed the tire.

[Oblivion]

Just fill it to the rated amount.  No one worries about that except the aspy engineers who designed the tire.

Done and done.


The gas station was like 2 miles away, btw.