Here's the problem. The owners manual for my 09 Mazda 3i touring (4spd auto) says that I'm supposed to use Mazda M-V transmission fluid. This is NOT the same as Mercon V according to some people but it is the same as ford FNR5 which is compatible with Mercon V. My dealer says Mercon V is fine, some other dealers don't. What I'd really like to put in is Mobil 1 synthetic. Mobil 1 synthetic says it's compatible with Mercon V but doesn't say anything about Ford FNR5 or Mazda M-V. Any ATF specialists here can help me untangle this.