Do you always have to top off your tires with air?

[The Zip]

Could be losing air through the valve stems.  Pick up a $2.00 tool and tighten them up and see if that made a difference.

[Grumpy Bear]

14 minutes ago, jimbofoxman said:

I only fill when they are cold, like first thing in morning before going to work.  Yes I always see the fluctuation when driving which I understand is normal.  Other than work it is parked in a garage.

I'm not talking about checking everyday.   Like the one that is always the fastest it seems like checked when my sensor said 31 and topped it off to 35 the next morning.  That was last week sometime and this morning is was 32.  The other two I topped off a couple weeks ago were at 32 this morning.  Yes the weather has been fluctuating, it's spring in Michigan.

The one may have a leak, I'll have them check that one.

I've been chasing a slow leak on the wife's SUV for months. New stem, new TMPS. Complete dismount, clean a reseal twice now and while it is allot slower....it's still there. But we have slowed it from twice a week to twice a month. Time for a tire change anyway. If it still persist then I will assume I have a leaking (porous rim). Rare but not unheard of. 

[The Zip]

1 hour ago, Grumpy Bear said:

If it still persist then I will assume I have a leaking (porous rim). Rare but not unheard of. 

You covered all the bases.  If it is the wheel, a little time refilling with air twice a month will save a little money on a new wheel.  Don't think you can seal a wheel without coating again? 

[Snowcamo]

I am always having to add air to my tires.   One I could add 2-3lbs every week, so that may be a legit leak.  Two of them I have to add 2-3lbs probably every 2-3 weeks.  4th one seems to be the slightly longer than #2 and #3.  I had them check one last rotation, which I thought was the worst one, but I think I told them the wrong one.  The only thing the guy said "could" be possible is the rim had a little corrosion on it maybe messing with the seal a bit.  But he couldn't find anything in the tire.

2015 Silverado
Original Tires, the horrible "ALL TERRAIN" Good Years
18" Aluminum Rims
37,200 miles

Put a good bit of dish soap in a spray bottle and find the leak. Easy money

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