I am looking to buy a 09 oriel prosmatic from a friend. Overall the car looks very clean and only has 90K KM on the odometer.
One thing I have a concern with is that the car has a CNG kit installed, which means that it has been run on CNG in the past. My main concern here is that the engine may not be in good conditions as I have heard that CNG can wear out the engine overtime, just like bad fuel can.
Given that the car has run for 90K KM already, what timely maintenance is to be done around this mark?
Should I look out for any specific issues in the car or any other 8th gen civic at all when buying?