@automotorsport_lover ! Welcome to CG125 Club. Heating issue is common under CG125 so don't be surprised. Its not the oil causing it. Its the engine itself. Plus, don't forget that your bike hasn't completed its running period yet ... so its over heating up is understandable.
The AHL's oil is of cheap quality, YES ... but it isn't THAT cheap that you start worring about engine health. The oil is thin, which means not only it'll provide proper lubrication to a brand new engine (which it badly needs) but will also let the engine generate proper heat.
One thing you'll also note that when the bike heats up, its Clutch starts to lose its working. Its also common under CG125.
During your running period, you won't be able to stretch oil more than 500-600kms anyway ... but you CAN take it upto 1000kms (which it'll still go easily ... but it doesn't assure maximum performance). It'll be more like "khench k le jana" (upto 1000kms).
Bottom line is, don't worry and keep using the AHL oil until your initial 3 tuneups, and/or until the warranty period expires. Till then you'll have to drive the bike carefully anyway ... so why bother going for better oils?
Oh and btw ... I have tested LiquiMoly (or rather, its being tested by me in my CG125 ... have driven a mere 200kms on it, almost). And its most over rated oil in Pakistan. There, i said it. Still, i think it'd too early for me to say such a thing. Lets see how far can i stretch this oil, or rather, how far can this oil be stretched.