The I-VTEC system on the FD1 is totally different to performance oriented VTEC systems. It is designed to work under low load with light throttle openings, the parameters being governed by the ECU alone.

Once you learn how to use the system the FD1 is capable of producing remarkable fuel economy. I had an FD1 Auto for 2 1/2 years & 60,000km, over which time I averaged 6.78L/100km with a best recorded of 5.8L/100 & a worst of 7.62L/100.

There is no noticeable difference in using 95 0r 98RON fuel, while using E10 decreases power by approximately 10% & at the same time increasing fuel consumption by around the same margin. So using E10 is false economy.

There are 2 things that govern fuel economy, 1 - The environment in which the car is driven & 2 - the way the driver uses his right foot. In the 2 1/2 years I owned my FD! Auto I never once had the low fuel warning light come on under 600km. Now as a Comparison, lets compare the Fuel Economy of my Current CU2 Euro Auto - just over 16,000km with an average fuel consumption of 7.2L/100km with a best to date of 6.47L/100km. So a current model Accord Euro uses approximately 0.5L/100km more than an FD1 Auto. I have spreadsheets available on all fuel used in both cars.

Have a read of this article.


http://asia.vtec.net/Engines/RiVTEC/index.html