The background story:
The car have been having some highway vibration in the past, I'd say in the last 10 years it was having mild vibration that was due to tires. You would notice immediate improvement when you get new tires, and it gradually got worse as the tire wears down. The wheels were always rotated regularly, around every 7.5k miles in cross / front back / left right.
The current tires on it are General Altimax RT, 2 2 years old and 2 1 year old (1 due to nail at the shoulder and 1 because mom hit a curb that she didn't see at a turn (15mph) and destroyed the sidewall of the tire.
Prior accident history:
1) 96, fender bender on the right, mirror is repainted and fender replaced. Car was touched by a merging car on highway.
2) 02, fender bender, front bumper hit car in front, replaced bumper energy absorber, radiator support, headlights, and AC condensor (it bent and rubbed against radiator till it leak).
Left fender rattle when idle in D, mechanics found 2 bad engine mounts (I think it is left and front, but forgot) and replaced them, no more vibration.
Struts replaced due to carpool wear and tear (4 people all the time)
3) 09, mom hit the gas station steel / concrete beam, fender bent and I can feel the car was out of alignment, camber kit installed on right front.
4) 11, mom got hit when lane change on the right by another car passing from the right. Both front wheels' studs threads got damaged, the left wheel bearing whine and replaced, the car is way out of alignment, camber kit installed on the left front. The right front door got so dented we replaced it with a junkyard door, and have to bent it slightly so it will seal to the car, most likely the frame is a bit bent.
New tires
5) 14, mom hit an intersection island curb when doing a left turn, blewing the right front tire but seems to have no other damage. I can feel the car is out of alignment again but didn't bring it in to be aligned.
I also noticed some white paint like residue on the firewall that has been there for a long time, like at least 10 years. I didn't pay attention to it but recently I started to realize it is actually at the inner CV joint of the right CV shaft. I suspect there may have been a slow leak of grease or somehow a white fluid got on it and flung out. It doesn't feel greasy like the black grease I saw on my other cars' torn CV boot, but more like a dried up home paint.