CVT transmission only takes CVT. LOL. Gel system? Which genius told you that??? Make sure you don't go to him for this work.
For Toyota, use the Genuine Toyota CVT fluid available. It comes in tin pack of 4 liter. One tin is enough for simple drain job as performed above. Following is written on the tin and it is Made in Japan.
Toyota CVT Fluid TC
08886-02105
You can buy this from Saddar in 3700+. Check with Ejaz Autos/Hamza Younas Autos/Mehran Autoa for price.
Pakistani Corollas do not have a CVT transmission so do not put gear oil meant for non-CVT transmission in this! As for who you should go to for change then I will say if you know a little about vehicle and have the tools to do the job, do it yourself.
If you cannot do it then the next best option is Toyota 3S, @strikerx (which 3S did you use for the job). They charge high. Another option is go to your regular mechanic shop with printouts of this topic as well as the Toyota guide in link above. Then make sure he does it properly and does not overfill.
Toyota and some mechanics actually go for the CVT sump removal. Clean it, fix and then fill. If you hear they want to do complete sump removal then please check before hand for the genuine seal which goes on the sump. Search before doing the job!!
A simple drain and refill works fine. I felt the change clearly in drive. I will personally do complete sump removal and cleaning after 100-120k on the odo. Before that, CVT fluid change every 30k.
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