The owners manual for my 04 Neon calls for ATF+4 fluid in the 5 speed manual transmission I own. I would like to switch to Amsoil, but I am confused about which fluid to use. Amsoil Synthetic Universal Automatic Transmission Fluid shows to be compliant with the ATF+4 spec, but Amsoil Synthetic Manual Synchromesh Transmission Fluid is made for manual transmissions. I am out of warranty, so am just looking for the best fluid recommendation for my application. Any advice on which one to use?