The synthetic is a far superior product and you can go farther with less. Meaning you won't have to change it again for a long long while.
In a cars trans dextron should be changed every 15 to 20 thousand miles where as synthetic can go 30 thousand miles and still look like new. A far superior product.
But check just the same to make sure it is compatible but I don't see a problem.
Synthetic is good stuff, if you start with it, or use shortly after break in. To convert an old engine from a standard ATF to synthetic could likely result in leaks. There are TONS of complaints of syn leaks on all types of automotive forums. Converting an automatic auto transmission from conventional to syn can be a death sentence unless it is relatively new.
Engine leaks happened to me three times with syn conversions.

Yes, I am sometimes slow on the uptake. Finally got smart and stopped converting cars run on conventional oil to synthetic. Using synthetic in a diesel eng is a false economy IMHO as the diesel oil gets dirty and that is what kills it. Syn gets just as dirty as conventional..
I own one car that runs synthetic, Mobil 1, and I honestly wish it did not as I have seen no benefit.
My local car dealer has a customer with over 800k on an un-rebuilt engine & transmission. He commutes from Portland, ME to Boston, MA. Oil has been changed at Honda's interval with conventional oil. Considering I get rid of my cars before 200k I think I'll be fine with conventional oil..
