Originally Posted By: Cooper
Originally Posted By: heavyhitter
I have read alot of threads about this issue and the vast majority say stay with ZR1.
I changed my wifes Honda's transmission fluid I used ZR1 because you are not supposed to flush the transmission and I did the fill and dump 2x method. I am sure that some old fluid remained behind so that is why I wanted to keep with the same type of fluid. It is near impossible to get 100% of the old stuff out.
Without trying to sound rude, that is just utter nonsense. It is pretty easy to get all the fluid out. Drain and fill...follow the drain and fill calculator. Or, use the cooling lines, you will get just about 100% of the fluid out...because 100% of the fluid goes through the cooler lines.
Also....."I have read alot of threads about this issue and the vast majority say stay with ZR1."....that is just uneducated and a ZR1 is a corvette...not ATF. Not to say Z1 isn't the OEM...it is made for Honda's. It is just not the BEST option. There are multiple posts with UOA's of Z1 and Amsoil ATF in Honda Tranny's. The Amsoil almost always holds up better than the Z1.
I said its near impossible to get 100% of the old ATF out.... then you tell me my words are utter nonsense, and its easy to get ALL of it out then you say use xx method and "will get JUST about 100%. You just contradicted yourself. So you make a point to disagree with my statement, then you agree with my statement. That right there is utter nonsense.
If you can dump out only 40% of your ATF and fill it and dump again, and again and again. Asuming that the AFT is mixing 100% parts of old and new you are only dumping 40% of 40% of 40%, it would take many many quarts of new ATF got get 100% out. To say flushing and filling you can get every ounce, every drop, every molecule of the old AFT of the transmition I would say yes it is NEAR impossible.
That said, will 2-3x fill and dumps work enought to get "enough" of the old stuff out, sure but will not get 100%.
If I get 90% of the old Z1 out and fill it with new Z1 I will not lose any sleep over it.
Yes I made a typo and called it ZR1 not Z1.
I never compared Z1 to Amsoil, To say that I have read many threads about the issue of people haveing some issues using non Z1 is undeducated is a misnomer. I can point out and link many threads that people claim using xxxx had caused them some issue's they did not have with Z1. Which has nothing to do with education.
The point I am making is that Honda Z1 may not "best" ATf but for the application, it is known to work and work well enough for many Honda's to stay on the road of hundreds of thousands of miles.
BTW I do have do have a bachelors, and masters degree, MCSE and CCIA. Not that it matters or makes me any smarter than anyone else on here but would make me more "educated" than most.
