Post by: JazzyJJ on June 14, 2018, 03:39:07 PM
The car is new with under 600 miles so I wont be doing it but I went on a long drive today and from time to time I had to rev it in traffic and up a few inclines. A few times when pulling away / putting foot down - the lights on the dash still showed green.. so economical...
Anyway, just wondering what experienced Jazz owners think. I craved alittle more speed / power today...
Post by: VicW on June 14, 2018, 03:54:40 PM
Honda engines thrive on revs so there is no need to hold on to the higher gears.
Vic.
Post by: Skyrider on June 14, 2018, 03:57:20 PM
Post by: JazzyJJ on June 14, 2018, 04:09:59 PM
Post by: Skyrider on June 14, 2018, 04:15:07 PM
I agree with this guy!
Post by: culzean on June 14, 2018, 04:24:10 PM
Slightly off topic... anyone notice better fuel economy with shell v-power? I know its better for the engine according to HonestJohn. In my experience with the old mk1 jazz and this jazz (although only half way through 2nd tank with this jazz / 1st tank was dealership fuel) ive found better economy with 'cheap' fuel... but its a very unscientific observation. I want to stick to V-Power - and need to work out how much extra cost it adds over a year of travel.
I found better economy with higher octane but would not use it every fill-up, may be every third or fourth. I also put a bit of redex in every couple of months and have never had a problem with fuel system on any car or motorbike I have had (when I put higher octane in one of my bikes it actually ran worse as the bikes ECU could not alter ignition timing to make use of it). Modern car and bike ECU are well capable of altering ignition timing to make use of higher octane and IMHO feel smoother and perkier. Handbook says minimum of 95 octane, but no maximum stated, for other parts of the world the engine may be modified to run on lower octane fuel.
Don't worry about damaging your Honda engine, all mine have done large mileages and have bounced off rev limiter more than once. Just keep decent oil in the engine. Take it easy for first couple of thousand miles is all modern engines require.
Post by: andruec on June 14, 2018, 04:58:34 PM
Post by: Jocko on June 14, 2018, 05:33:58 PM
Post by: Skyrider on June 14, 2018, 05:47:22 PM
Post by: Skyrider on June 21, 2018, 08:22:21 AM
Post by: culzean on June 21, 2018, 08:34:47 AM
I have noticed a contradiction, some people monitor their fuel consumption to an accuracy of a teaspoonful of a gallon, yet are happy to use the most expensive high octane fuel they can find. Obviously cost is not in the equation so why drive like a granny? Unless by you are one of course. ;D
I found over many years of an 80 mile a day commute that higher octane fuel can be cost effective as it does give better mpg (or it can give a bit more power, which if you use it unfortunately negates the better fuel consumption) - I have found this on both Jazz and Civic. And no it is not a placebo effect ( I did a blind trial on her indoors car), my wife used to use supermarket fuel and her identical Jazz never ran as well as mine did, I filled it up (without her knowledge) with Ultimate and she actually asked me 'if I had tuned her car' - when I told her it was just the fuel she never used supermarket fuel again.
Post by: mikebore on June 21, 2018, 08:35:02 AM
I think any improvement felt by using greater than 95 octane fuel in a Jazz is psychological justification for the extra expense. It is reputedly a free country so it is a choice we all have.
For the past 50 odd years I have also believed that using a higher octane than needed to stop detonation (pinking) was a waste of money.
However modern engines detect pinking and can advance the ignition accordingly. Changed ignition timing with higher octane fuel provides a technical reason for better performance that didn't apply in the olden days.
I can't claim I have seen a difference myself but I have a more open mind now.
Post by: mikebore on June 21, 2018, 08:38:19 AM
I have noticed a contradiction, some people monitor their fuel consumption to an accuracy of a teaspoonful of a gallon, yet are happy to use the most expensive high octane fuel they can find. Obviously cost is not in the equation so why drive like a granny? Unless by you are one of course. ;D
At least one granny I know (my other half) drives her car hard.... acceleration, braking and motorway speed.. :D
Post by: Jocko on June 21, 2018, 08:58:36 AM
Obviously cost is not in the equation so why drive like a granny?I am retired, have all the time in the world (St Peter permitting!), and treat striving for great mpg as a game.
Post by: Skyrider on June 21, 2018, 10:33:13 AM
Post by: jazzway on June 21, 2018, 12:51:03 PM
I have noticed a contradiction, some people monitor their fuel consumption to an accuracy of a teaspoonful of a gallon, yet are happy to use the most expensive high octane fuel they can find. Obviously cost is not in the equation so why drive like a granny? Unless by you are one of course.For me V-Power in Belgium is cheaper than the normal 95 petrol in my own country. Plus, i don’t like ‘bio ethanol’! Slightly better mpg and/or power is just an extra.
Post by: guest4871 on June 21, 2018, 04:21:50 PM
The octane rating, these days, is not really relevant. The quality/ quantity of detergent additives together with reduced bio ethanol are the significant differences.
Try Shell V-Power in a 10 year old car which has run only on Premium 95 and, over a relatively short time, the difference is remarkably obvious.
Post by: Skyrider on June 21, 2018, 07:24:51 PM