About trip we always take corolla on trip which is petrol so you can get idea . i don't have problem in refuelling car with petrol as we can run on petrol when we want but in city i am trying to save some money
ya my friend told me that many SX4 CNG owner had some vibration problem but he don't have that . SO it look like safari we never know which fruit we will get .
Or i will go for second hand swift which i saw .