at your mileage it is safe to say that it might be time to replace your motor mounts. even if they are fine, considering your mileage this may be considered preventative maintenance seeing as how the rubber from you dogbone mount is all ready deteriorating.
if you have a 5sfe then you can use this diy for all the mounts:
5SFE Motor Mount How-to
also if you are considering replacing the dogbone mount, i'd suggest that you swap it with the gen4 motor mount and mount bracket. if you look at them side by side you can tell the gen4 was redesigned and is much better. however id reccomend that you get some new hardware with this because when i did the swap, i got a little bit of play that is bothersome during a cold start; specifically the half threaded bolt that goes through the mount and connects with the mounting bracket.
here is a link to the diy gen3 to gen4 dogbone mount and bracket swap:
DYI Improving Gen 3/3.5 vibration problem at idle

this is what my dogbone looked like by the time i did the gen4 dogbone swap

gen3 vs gen4 dogbone

gen3 torque mount bracket (bottom) vs gen4's (top)