just bought a new 2004 CIvic LX last week and have 300 miles on it. I
noticed two problems now:


I can hear some annoying humming(or drone) noise on the highway, say above
50mph. This noise is like sth scraping the road surface. Looks like it is
still there whether I press the gas pedal or not. I suspect tire noise?
anyone has same experience?

update:
I took my car to the dealer today. I was told it might be hubcap problem,
and causing some wind noise. it's ridiculous. Honda guy said there are
some complaints about Civic hubcaps. Never heard of this. my car still has
noise on the highway speed say 60mph. But looks like to be in and out. It's
hard to be heard above 70. The guy checked the brake, bearing and
suspension, said all are OK. so I don't know what causes the noise. Wind?
Tire? or Road? I only can hear on the driver's said, Honda guy thought
it's because of the existance of many hoses on the left side. Anyway,
confused. I exchanged the front two tires yesterday, the noise is the
same.