I have recently bought a used Ford KA3. My dealer, driving instructor and motorcare shop assistant all told me it would be OK to use ANY antifreeze/coolant to top up the reservoir - even though it says in the manual not to mix different colours. Any of the containers I looked at in the shops are opaque and you can't see inside to see what the colour is anyway. Having triple-checked, I bought some and now that I have it, have discovered it's blue - and the stuff in my reservoir is an orangey colour. Is it DEFINITELY OK to use this to top it up?
Do not mix Differnent colour anti freeze, if you wish to use the anti freeze you have just purchased you will have to flush the system and start again