Avid reader but first post.

I have a 2006 V8/5.4 L F150, stock pretty much.

Put on some General Grabber HTS about 5000 miles ago, pumped up the PSI to 35 a few weeks ago after an oil change and they started looking low so I checked and they are down to 29 PSI in all tires. Is this normal at all, or what's the deal?

Thanks.

 

Yes it is normal for tires to lose air over time. Especially if it has been a few weeks. lSome tires lose more than others. One car I had never lost any air pressure it was great.

 

If they are all the same it sounds like a major temperature drop outside.

 

yea the volume of a gas (air) will decrease with a temperature drop, simple gas laws, but it will have to be a major drop before you wouldnt notice a whole lot