Mashallah Allah Aap ko Mubarak karey ye Gaari! Looking very hot! I am in a similar position now.. mine is 2015 December model with 44K original Odometer, just bought last week. Mashallah I am very satisfied with the car too; ths noise isolaion, soundless engine, and amazing acceleration is something to write home about.
1. I too have shifted from Cultus and yes, power wise this car is better than last gen Cultus but I think the gear ratio was much longer in my carburetor cultus and that I preferred. This is of course kept according to power and fuel economy in mind. Max I have taken the car is 90kmph and the brakes are very very good. But yes, since the suspension is mich more advanced it has a lot of travel and due to height of the car ot is prone to body roll.
2. Mashallah the average is superb. I am still in the process of calculating my car's average with A/C. It has the stock General Euro Tycoon tyres.
3. I have also kept 30 psi but looking at tyres they look a bit 'loose' but otherwise the car runs fine.
4. 5W-30 is very good viscosity for oil specially the car isn't driven much so this thin oil is perfect.
5. I have no idea about this one.
6. Same, no idea about this one but yeah Wagon R's steering becomes rock hard on high speeds.
7. The satisfaction of waxing and shining the car by ourselves is unmatched. I also did waxing myself the day the car came and it still shines like anything after a week. I spent 3-4 hours on the waxing and took a lot of precautions, you can see my process on 'Wagon R maintainence thread' that I am Maintaining and you are welcome to contribute and follow there. However, it is so good to see you went further and cleaned interior, trims, wax, etc.
Mashallah.
