I had 65,000 VERY hard miles on a 2009 Honda Fit, 45,000 miles of that had Redline D6 with 3 dump and fills and the last fill of the 3 had 1 qt of Redline Lightweight Racing ATF and 1 qt of regular Redline ATF both having no slip agents or basically Type F. I want nice firm shifts. I just sold the Fit and it is running great. I added a TransProtector inline filter about 7,000 before and was getting a nice clean filtered ATF, which helped on nice clean shifts, very noticeable in increase in speed of the solenoid and therefor speed of shift. Reduce particulate count helps on friction. I do not like OEM oils!! DW 1 and especially Toyota WS.
I did the same Redline D6 and added cocktailing of two qts of non slip agent racing ATF on my Wife's new to us lease returned Rav4 with 21,400 miles. I now do the drop the pan if I has one, refill and pump out through the return line to get all the olfd ATF out in one shot. Which by the way had totally burnt Toyota WS "garbage" ATF. I have never smelled a worst smelling ATF in my life. I got sick being around it. The Rav4 came from a women in upstate NY and it had no hitch or soccer mom hauling marks.
I just ordered tonight my Redline cocktail mix for my wife's old 2013 Hyundai Elantra GT (15,000 low miles) that took the place of my old Honda Fit. As of 2013 1/2 Hyundai uses a group 5 ester ATF. I don't want to pay the $20 a qt Hyundai ATF and I don't know if the skimpt on the add pack since they don't consider a Hyundai a high HP car/truck where Redline has to consider it's ATF could be going into a 500hp vehicle. The Elantra GT and the Rav4 will be towing a small boat and will both have trans cooler added to them with TransProtector filter too.