Anyone notice that their speedometer isn't too accurate?

[gmantheman]

Tire manufactures revs per mile x1.03 will give a more accurate reading.

 

[Shotokan1509]

I always trust my GPS speed.. that is max speed in MPH in the red box.. and this was in my Subaru lol.

I always consider speeds approx ~5mph, Ive had speedos vs gps vs road side radars vary to both sides depending on the day, etc.