bb700092

I have a brand new 09 Altima 2.5SL sedan. I went for the first oil change in the middle of December when the car had about 1800 miles on the odo. After the oil change, since around 2200 miles on the odo, I occassionally hear a rotating sound, something like 'digidigidigi...', which becomes faster (not louder) when I increase speed and slower (not softer) when I decrease the speed and stops when I stop. The sound is loud enough to be noticeable amidst road/wind noise and car audio. The sound wasn't so noticeable before the oil change; in fact, I never noticed it before.

I think the sound might be from the rotating motor which is rotating faster or slower as I increase or decrease speed. The Nissan dealership used Quaker State synthetic blend 5W30 oil. Can it be causing this sound? I have not noticed any other change in the car, driving dynamics or mpg.

Also, a few days after the oil change, the weather got much cooler. The temperature dropped more than 30 degrees. My tire pressure light came on even though the dealership set the tire pressures a few days back. Can it be the chilly weather causing the sound?

Can the sound be from anything else other than motor? At first I thought it was a loose wheel (since the wheels were balanced during the oil change) but the wheels seem to be fine.

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bb700092

I had a big nail on the interior sidewall of my front passenger side tire. I believe that was making the noise. Changed the tire and the sound is gone.

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