So I have a 91 Accord EX, and ive been noticing when i drive on the highway (anytime over 60ish mph), I feel this faint vibration. Its not a constant one, It's on and off, almost like its pulsing. I know its not the tires, they're only a week old and checked them today for any uneven wear or bumps. It only happens when I'm driving over 60. Not when I'm stopping or idling. Its just very strange and was wondering if anyone else has experienced this as well?