I just put 2 coats on my Mini and I can't hardly tell I used any (while looking inside the bottle). Yep, this is a small car but still. I'd say you could get by with 1oz per application on a 2 door Camry pretty easy. Even if you used 2oz, that's 8 times which is 2 years.
I used a DA and a 5.5" flat LC blue pad to apply, this may have helped use as little as I did.
As a side note, it looks great. It's my 1st time using it. I first used the Wolfgang Finishing Glaze (which is also outstanding on my soft paint). The DGPS wipes off very easy, just be sure and let it sit for 45 minutes, the bottle doesn't say anything about this but it does on the AG site product page. I wiped my 1st coat off after just a few minutes, maybe 10 or 15. But I let the 2nd coat stay on the full 45.