Dear All, I am using my Civic 1988 on petrol from almost last 1.5 years. Kindly tell me what is the ideal petrol average for my car (its engine is in good condition/no smoke, no oil burnt/reduced). Most important pls tell me the air intake (to the air filter) as reduced for cng should be kept as it is or should remove all blocking (is unblocking good for fuel economy?) Moreover, i also want to remove the CNG cylinder from the trunk. Pls guide what other cng related parts needs to be removed with cylinder. Thanks in advance.