There's nothing to worry. All the filters are available in lahore, from the worst quality ones to the genuine one. Ranging from 400 to 3000. Plus oil filter as well.
I'm sure if you look, you'll find the same in gujranwala. In case you don't, you should visit lahore once. Get a dozen air-filter and oil filters. Get good quality ones, not necessarily original OEM ones in the whole-sale price. I've heard there's a market for these filters near minarePakistan. Keep it with you, and change when required. You'll not have to worry for a good long period of time.
Plus don't go to Montgomery, until you know your way around, have ample time to survey and are good at bargaining. Some of the biggest thugs are present there.
Regarding tuning. Even with the low quality fuel, the car should go 40k km. So at 40000 km is when you'll require throttle body service, and the basic tuning, which you should get done from some one with experience, rather than go to Honda. For vezel, try not to visit Honda dealerships, they'll just present fake arguments just to confuse you.
There isn't another car available to Pakistanis at the moment that might be a worthy competitor to vezel. So enjoy it.
