Thanks for the advice guys, had never heard of that additive and good to know that I probably don't have anything to worry about.
If anyone is still reading this, have YOU had your front engine mounts replaced as recommended by the TSB and did it help?
The TSB recommends it for "excessive noise and vibration" and even without trying out other cars I'm 99% sure mine falls into that category. I've been in plenty of Accords as a passenger/guest driver over the years and would remember if any of them sounded or felt similar. The only car that comes close to it is a VW GTI diesel that my sister used to own.
My conundrum is that my dealer/warranty provider already insists that this is completely normal, and thus will likely resist any efforts to do the work even if I provide the TSB. The warranty is provided by Guardian Warranty Corp. -- they are not fly-by-night but they do have a long history of fighting legit claims and bad customer service. (It was included in the price of my car, which was lower than similar cars with no warranty and higher miles so I figure anything I get out of it is better than nothing.)
Roughly how much does it cost to replace and/or adjust the mounts anyhow?
