Hi,

I have an unopened tranny fluid (1qt). I will be replacing my tranny fluid soon and obviously will need an extra 1qt bottle. If I buy another qt, it will either be newer or older oil compared with the one I already have. What effect will it have if I combine different age oils? Should I just buy two quarts and chuck my unopened bottle? Am I just being obsessive compulsive, LOL?

 

how old are we talking here? so old you can buy the same type?

 

Oh no. I don't know how old it is. It is the Honda MTF, I recently bought from HandA Accessories. I will be buying the extra quart locally at a Honda dealership since I messed up and didn't buy two quarts from HandA. Of course, I don't know how old HandA or the dealerships keep their stock. I would imagine it is ideal that both quarts come from the same batch?

 

i know Honda reformulated their MTF a year or 2 ago, so as long as its the new formulation(it should be if it was purchased sometime this year) you should be good to go.

 

You get some GM syncromesh its good $h!t

 

The unopened can of oil will last a lifetime and more. If it were opened the oil still wouldn't go bad but would have a chance at contamination and the possibility that the additives are volitle and could evaporate. Even if it is Hondas old formulation, I would personally use it along with the new and improved stuff. There was nothing wrong with the now outdated MTF but things do continually improve. It would seem a waste to me to throw a perfectly good quart of oil away.

 

Thanks everyone for the comments.