Yes there is nothing wrong with using Synthetics in your vehicle. AMSOIL goes 25,000 miles on the same oil and filter as well as giving you a 6% savings in fuel.
If I were you I would read the Owner's Manual to find the exact product options you're thinking about using. In some cases unfortunately, the highest quality synthetics will not fit what O.E.M.'s specs or v.v.
yes, you can switch to synthetic without doing any mods. Do NOT take the bad advice out there to flush your engine first. That's a myth and a flush can destroy your engine.
I just got a 2000 Camry with 122k miles and it's in really good condition so I would like to keep it that way. I know that you're not required to put higher quality stuff in a camry, but could I? For example: can I put fully synthetic oil in my camry or is it not meant for it?
I just want to have this car for a long time and take care of it the right way!