AOA guys, hope you all will be doing great
I have a civic 95 EX with its origional carby D15 engine. The engine is in perfect condition. but its not giving me a good fuel milage. I used to run it on CNG but then the CNG kit was removed and not it runs only on petrol. i want to swap the carby engine with an EFI one. I have certain queries, if anyone can answer them.
1) Is a D15 VTEC more fuel efficient than D15 carby.
2) Is it wise to swap the engine with VTEC one.
3) Any other better swap option than D15 VTEC
Thanks in advance