If the Comma ATF meets the spec then it is safe to use it. I do not believe it to be a 'Synthetic' just a refined mineral that the law now allows therefore to be called synthetic. (don't ask).
If your ATF is discoloured then it has broken down, the worse the colour then the worse the ATF, very simple. This is far more accurate than and dealer or manufacturer stating a milage.
So if its not red then replace it. Sure there is a cost involved as in all things with cars. Better to have a nice gear change and not risk having to have a gearbox change with the agg and cost.
Yes the cheapest ATF meeting the spec will do. How long it will remain in spec is anyones guess. In a similar vein any engine oil meeting the basic spec will do as will tyres made in Korea or even remoulds (if still about). Your money and your choice. What is clear is that cheap can be expensive in the medium to long term. Its fairly common knowledge that Synthetic oil/ ATF lasts 2 or 3+ times that of mineral; that Synthetic oil/ATF will allow about 3-7% more MPG, and certainly Amsoil ATF will take all the hard driving and towing you can throw at it with ease. If you are going to sell the car in the next couple of months then save a few bob and use Comma.
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