Things that make you go hmmmm

send the pic to the service manager just as a "you know I know" kind of thing.

 

I do. In the summer I run 36-38 PSI (30PSI is what door jam says). In the winter I run 30. Drives better slightly overinflated I find in the summer. This is why I ask them no to touch the pressures when I take it in.

 

Another I've experienced is them telling me they greased the zerks, did them this past weekend and one pushed out 3+ pumps of nothing but air before it took another 10+ pumps to fully purge.

I shudder at the thought my truck is in right now getting new leafs/body mount dampeners/hood glued/hopefully new alternator.

 

No, I run around 35 psi or so, which is well within the limit for my tires. But, and I'm sure you know, that, as soon as you start driving for any period of time, your tires will "gain" pressure due to rolling resistance and the resultant friction, which causes heat, and that heat is transferred into the closed vessel that is your tires. Depending on load, ambient temp, and local conditions, your tire pressure will change individually. For example, if I take off down the interstate in a southern direction at 4pm on a sunny day, I can watch my tire pressure monitor and see what is happening. What will happen is the tires on the right side of the vehicle will increase pressure at a rate of about 1 psi per 10 or so degrees. It's not uncommon to see a 2-3 psi difference between sides. In addition, if you are hauling a load, the rear tires will heat up and increase pressure at a faster rate than the front tires. It's likely that, if you set your pressures perfectly before starting a trip, within several minutes none of the tires will have the same pressure. I have seen a difference of as much as 6 psi change! Now, if you run nitrogen, you won't see much change. If you drive in a straight line at night, they will pretty much be the same. But bottom line, your tires change pressure all the time.

 

Well you did ask for a oil change. You didn’t ask for a oil and filter change. Lol.
You would think that would be obvious but to some places it isn’t.

 

Haha!! This was 2-3 years ago, I am sure I specified to change the filter too. I am assuming they didn't feel like dropping my skid plate and didn't know you could access the filter through the drivers wheel well. Its a good talking point when friends try telling me that its pretty much cheaper to just have a shop do your oil change.

 

Haha true

 

Dude... drinking the kool aid is not in my job description, but logical thought is. I run just plain air in my tires, but pure nitrogen will be more stable than plain air. I posted fact based on observation.. plus the delta T is the main thrust of my post, not nitrogen filled tires.