Over Inflated Hankooks and Not Enough Oil

[StangKiller]

I noticed after I took delivery (back in October of last year) that my rear tires showed 42 PSI and my front tires showed 40 PSI via TPMS. I knew they were supposed to be around 32 PSI but never bothered to take some air out. Today I finally got around to doing so and what a difference it made. Much, much smoother ride. So, if anyone has taken delivery lately, check your tires and also your oil level. Dealer was short by roughly 2 quarts (or I burned 2 quarts in the first 2000 miles).

 

[Midnightsun]

I noticed after I took delivery (back in October of last year) that my rear tires showed 42 PSI and my front tires showed 40 PSI via TPMS. I knew they were supposed to be around 32 PSI but never bothered to take some air out. Today I finally got around to doing so and what a difference it made. Much, much smoother ride. So, if anyone has taken delivery lately, check your tires and also your oil level. Dealer was short by roughly 2 quarts (or I burned 2 quarts in the first 2000 miles).

These are items forgotten by the dealer and cannot be blaimed on the manufacturer. They all come pumped up to 40+ psi when they ship and oil is at the min level. Dealer is supposed to take care of this but like most service today they are only interested in getting it out the door to make room for another customer. Sadly, i check all these things as soon as I get home with any new car I purchase and most of the time they are bad and this goes for several brands I own.

 

[JimB47]

My tires were over inflated by about the same amount upon delivery. And, as you say, deflating them to the proper pressure really improves the ride. Fortunately, my oil level was full when I picked up the car and after 2600 miles hasn't used a drop.

 

[LouKango]

Same here... my tires were at around 41psi when I purchased my car. Also my low beams were aimed way too low.

 

[opticsguy]

New board member, but I've gotten my car back from the tire shop with 38 psi when the door sticker says 33, and my wife's VW has come back from the dealer with 40+ psi also.

I sense a nefarious plan to increase gas mileage by having all dealers and tire shops inflate to the max psi on the side of the tire.

 

[Monolith2001]

There was a discussion about this fall of last year. My tires were over-inflated to 40 psi cold and after dropping down to door spec, I elected to reinflate to 40 psi hot as I liked the slightly more sporty ride. Right now they get down to 34 psi on start up and go up to 38 psi after a few miles of driving. Ride has never been an issue, handling has been excellent and treadwear after 15,000 miles is uniform and exceeds expectations. With summer coming and higher temperatures, may drop down a few psi.

While I would not recommend this to everyone as climate, roads and driving habits all contribute to hot psi and tire durability, it's worked well for me. What you never want to do is have under-inflated tires as that will destroy a tire in a hurry with more wear, more heat, degradation of the sidewall structure and can lead to minor flat spotting with some tire constructions if the car sits long enough.

 

[Mark_888]

Dealer was short by roughly 2 quarts (or I burned 2 quarts in the first 2000 miles).

The dealer should not have anything to do with factory oil fill amount on a new car, unless it was a demo and dealer changed the oil at some point.

 

[StarPower]

I'll check my oil later today. My tires are both at 34-35 psi when cold (sticker says 33/35 psi for the staggered 19s). My dealership filled with nitrogen before purchase, so this wasn't the factory pressure. I believe they set the factory pressure high to help prevent deformation during shipping.

IIRC, the 2nd gen CTS-V had problems with low differential fluid level in new cars. It wouldn't be a bad idea to check all of the fluids on a new car.

 

[drpearso]

My tires came back with 40psi after my 7500 mile oil change. They feel better that way, but are suppose to be 33/35 from others posts here. Assume I need to change them to at least about 35psi? I do not see any bad wear signs etc, but the 40psi air pressure has only been that high since Feb.

 

[UmALum1990]

My tires were over inflated to 44 psi/ tire when I took delivery of my car December 28, 2015. Adjusted to 33 psi and been smooth sailing ever since!

______________________________

Help support this site so it can continue supporting you!

 

[malatu]

My tires came back with 40psi after my 7500 mile oil change. They feel better that way, but are suppose to be 33/35 from others posts here. Assume I need to change them to at least about 35psi? I do not see any bad wear signs etc, but the 40psi air pressure has only been that high since Feb.

Appropriate psi is listed on a metal plate on driver's side door jamb, I believe. Every car that I've ever owned, that's were it's located.

 

[kn5owa]

My tires were over inflated to 44 psi/ tire when I took delivery of my car December 28, 2015. Adjusted to 33 psi and been smooth sailing ever since!

My tires were overinflated at 40 psi and oil was also 1 qt low.

didn't hurt anything

 

[sabre3]

Mine are usually around 38-41 depending on when I check. Should I take it in to get adjusted?

 

[Mark_888]

Mine are usually around 38-41 depending on when I check. Should I take it in to get adjusted?

Can't you let the air out yourself?

 

[sabre3]

Can't you let the air out yourself?

Thought of that but then its a guessing game and have to check and recheck all 4 tires. Then if I go too far I have to go fill them back up. I just figured they would have an easy way to do it. Plus its like 30 degrees out.

 

[Midnightsun]

Thought of that but then its a guessing game and have to check and recheck all 4 tires. Then if I go too far I have to go fill them back up. I just figured they would have an easy way to do it. Plus its like 30 degrees out.

Oh my! Do you bring it in to the dealership to fill gas? Sorry, could not resist.

 

[ksoze]

Spend $10 and get a digital tire pressure gauge and keep in the glove box.

 

[sabre3]

Oh my! Do you bring it in to the dealership to fill gas? Sorry, could not resist.

Didn't think the question was that out of line. Sorry I asked. Since I bought the car 2 weeks ago and the dealership is next to my office it was more of a question of whether or not I should bother with adjusting the inflation.

 

[Mark_888]

Didn't think the question was that out of line. Sorry I asked. Since I bought the car 2 weeks ago and the dealership is next to my office it was more of a question of whether or not I should bother with adjusting the inflation.

Yes, you should adjust the tire pressure. But I would try and do it yourself if possible, since you are likely to do a more conscientious job than your dealer. If you make a mistake and let too much air out, you can take it to the dealer (or any tire store) to have more air added. Making tire pressure adjustments are not really a warranty issue.

 

[B.P.]

A couple of posts on this thread describe the Hankook tire ride as smooth or not an issue. Is that the general impression, or do others have a differing opinion on the smoothness of the ride?

For me and my V6 AWD, smooth around town or on local highways, but at interstate speeds of 70+ mph, I will be generous and call the ride "busy" at best. Anyone else?