1. You have hit it on the nose the following is what Red Line themselves sent me:
The Racing ATF and other ATF's are compatible, they will mix without a problem.
The Racing ATF is a Type F fluid and doesn't contain the friction modifiers that a Dexron fluid contains so will result in a firmer harder shift in your transmission. This resulting change in shift feel may not be acceptable in your vehicle so I would recommend exchanging it.
Regards,
Red Line Oil
2. Wow Fimum Fit, are you a chemist and or an oil expert?
Thai GI sends…