tire inflation

I don't know, but my dealer likes to set all 4 of my tires at 32 psi. I've even given them written instructions detailing what tire pressures I want, but alas, my Prius returns with low tires each time. I'm just getting into the habit of readjusting them myself after the car is serviced. I recently bought a portable 12-volt tire inflator and keep it in the back of the car.

 

I put on my very meanest face (not very mean I'm afraid) and tell them "LEAVE MY TIRES ALONE DON'T EVEN CHECK THEM" so far it's worked.

 

One wonders that if you were right out front of the service bays and checked your tires then took out the 12 inflator and inflated to the level you asked for. You could follow that by opening the hood checking and removing the extra oil. I would bet the service manager might come out and talk to you, or not.

 

<div class='quotetop'>QUOTE(hdrygas @ Jul 23 2006, 09:51 PM) [snapback]291209[/snapback]</div>

Extra Oil?? Please explain!

 

<div class='quotetop'>QUOTE(brandon @ Jul 22 2006, 08:09 PM) [snapback]290756[/snapback]</div>

hi Brandon,
How long does it take the portable 12 volt tire inflator to increase the tire pressure from approximately 32 psi to 42psi? I'm asking because I may get one if the inflation is relatively quick.
Thanks
Dave

 

Haven't timed it. Less than 30 seconds, maybe? Just a guess. It doesn't take long. I got it from Sears.

 

<div class='quotetop'>QUOTE(whodat @ Jul 23 2006, 07:27 PM) [snapback]291218[/snapback]</div>

I say 1 minute, or possibly 2 with a very weak pump.

 

<div class='quotetop'>QUOTE(Rand Reed @ Jul 23 2006, 06:56 PM) [snapback]291211[/snapback]</div>

The normal oil amount is about 3.7 quarts. Even 3.5 is OK. You get service techs who put in 4 quarts. If you give them 4 quarts of your own oil, they'll probably put all 4 in. One place I gave them 3 quarts of synthetic and told them I'd put in the remaining. They put in my three, followed by a quart of their own dino oil. :blink: I got them to correct the damage (ie remove all oil and filter, then put in the correct amount).

I generally just don't bother with instructions on the tire and correct the amount the next morning. At one place I went to, I told them I wanted 42/40. They told me they would put in the correct pressure. All they did was rotate the tires so I ended up with 40/42.

 

Mine came new from the dealer last week at 26-24 -- go figure. I have a very accurate guage and a compressor in my garage/shop so I know they were way off.

 

<div class='quotetop'>QUOTE(mootsman @ Jul 24 2006, 06:27 PM) [snapback]291686[/snapback]</div>

:blink: Was it riding on its rims?!?

 

I think the reason why they are lowered is because they reommend the tire PSI to be around 35 front and 33 rear. 40-42 PSI will decrease treadware life of the tire and will increse the wear on them. Yes mpg increases with higher psi due to less rolling reistance, but it doesnt help the tires out.