My V6 cefiro car was serviced by Nissan 2 weeks ago and they downloaded a new EFI map into the computer that they said would allow the car to run better on Gasohol 95 ...and ...IT DOES , gas mileage is up by around 1 Kilometre per Litre and the engine feels more responsive and smoother . I was skeptical but the 1500 kilometres i have done in varying conditions over the last 2 weeks has proved the new Mapping has a definite benefit.
jerry
jerry