CAREFUL!!!!
I’ve owned two CVT-7 Jazz’s and I can tell you right now without any shadow of a doubt ATF-Z1 is totally the wrong oil for your Jazz CVT.
The confusion is that in your owner’s manual it will say that ATF-Z1 should be used and may be Dextron III if ATF-Z1 is unavailable. However this is now incorrect.
Honda released a Worldwide product update (PDU) that informed all dealers, and service depots to use only Honda CVT-F (Honda part number (4 litres) 0826099904HE) in all CVT transmissions in Insight, Civic IMA, HRV, and JAZZ.
ATF-Z1 should only be used in conventional, i.e. non-CVT, automatic transmissions. It is highly likely that your dealer (in the UK) will not know this. The two Honda dealers I use did not know and I had a hard time convincing them until they find out about the HONDA product update notice!
If you call HONDA UK’s customer service line they will tell you that there is only one transmission oil suitable for the Jazz CVT-7 - Honda CVT-F. There is currently (March 2008) no oil produced by another manufacturer that Honda have qualified as being an equivallent to CVT-F.
If your dealer has replaced your CVT transmission oil with ATF-Z1 get it changed immediately! It will eventually damage your CVT transmission if used long term.
I know it is very difficult to tell a service manager his job but you HAVE to in the case of UK Honda Dealers with respect to the correct CVT transmission oil to use.
If you are having your transmission oil changed, explicitly say that you wish the transmission filled with CVT-F and NOT ATF-Z1 (or equivallent). Also since CVT-F comes in 4 litre bottles, ask to get the remainder (0.8 litres) so you can “use it top-up”. That way you know it’s correct.
If you’re thinking of buying a Jazz CVT-7 that has travelled more than 50K miles, check the colour of the transmission oil (yellow dipstick, front right-hand side). ATF-Z1 is a very red colour. CVT-F is a golden-yellow with a tinge of red.
Hope all this helps you fellow Jazz CVT-7 drivers!