Clubjazz - Honda Jazz & HR-V Forums

Honda Jazz Forums => Honda Jazz Mk2 2008-2015 => Topic started by: guest1262 on June 28, 2011, 11:35:30 AM

Title: MPG improves when I put my foot down!
Post by: guest1262 on June 28, 2011, 11:35:30 AM

I've noticed this more than once. When I choose to drive my Jazz a bit faster fuel consumption improves!

It must be a VTEC thing. As engine oil pressure, speed, temperature and throttle position influence the cam switch-over point (I'm no expert, I just looked at explanations on YouTube so correct me if I'm wrong).

Question: Is there any way, other perhaps that engine noise, that you can tell when the cams change?

Title: Re: MPG improves when I put my foot down!
Post by: csp on June 28, 2011, 03:31:24 PM

I have had suspicions that when driving my ES VTEC on the motorway that if I drive at close to 70 mph then consumption seems better than if I drive slower, but I have not really been able to prove it.

Title: Re: MPG improves when I put my foot down!
Post by: olduser1 on June 29, 2011, 07:48:54 AM

The 2012 EX model have higher gearing, ours at the legal limit is turning at a smiggen over 2k rpm, hence a reduced fuel consumption.

A light right foot and a thinking nut behind the wheel are key to fuel economy in my case.


I still miss my Subaru whoosh to 7krpm though

Title: Re: MPG improves when I put my foot down!
Post by: Garyman on June 30, 2011, 12:07:15 AM

Quote from: olduser1 on June 29, 2011, 07:48:54 AM

I still miss my Subaru whoosh to 7krpm though

I miss my CTR hitting vtec and going all the way to the red line  :'(