Author Topic: FUEL  (Read 609 times)

Wilderbeest

  • Approved Member
  • *
  • Posts: 11
  • Country: gb
  • My Honda: Mk1 Honda Jazz dsi Sport
FUEL
« on: November 15, 2020, 05:55:04 AM »
Recently since May, due to an EML , on the dash , I decided to try 99 octane  fuel , from Tesco.
What a  difference it makes to my old Jazz.  (132000M)

Its positively lively, responds better , and is a pleasure to drive.
Ok , the fuel is a bit dearer , but, just the throttle response is worth it.

Kremmen

  • Approved Member
  • *
  • Posts: 123
  • Country: england
  • Civinfo interloper
  • My Honda: 2013 Civic EX Auto
Re: FUEL
« Reply #1 on: November 15, 2020, 06:36:24 AM »
Interesting, because these engines are optimised for 95 RON.

I did a lengthy mpg comparison many years ago with a 1.8 Civic using Shell, BP and Tesco, using 95, 97/98, and 99 RON depending on what each company supplied.

Same commute roads, same time of day,  etc. Taking in motorways, A and B roads.

I could find no driving difference and the mpg increase was tiny < 3mpg, even though, at the time, BP were quoting a large tank range increase.

Since then I've stuck with Tesco 95 without issue.
Let's be careful out there!

peteo48

  • Approved Member
  • *
  • Posts: 1920
  • Country: gb
  • I have entered the Jazz Age
  • Fuel economy:
  • My Honda: 2020 Honda Jazz 1.3 EX Navi CVT Shining Grey
Re: FUEL
« Reply #2 on: November 15, 2020, 11:39:08 AM »
I have been using premium fuel in my Mk3 for the last 4 fill ups. I have noticed no discernible difference in mpg - indeed other variables like driving style, ambient temperature and traffic density all much more significant imho.

But I am now convinced the car is livelier with the higher octane fuel although, here again, that could be down to the engine loosening up (bought new in January). I also note that, on the Mk3, the compression ratio is high - 13.5:1. Does this mean the knock sensor has allowed the timing to advance?

I'm going to do another premium fuel fill then go back to 95 RON and see, after a few fill ups, if the car feels less lively.

Westy36

  • Approved Member
  • *
  • Posts: 115
  • Country: gb
  • My Honda: Jazz 1.4 ES 2013 Silver
Re: FUEL
« Reply #3 on: November 15, 2020, 01:11:29 PM »
The great fuel debate! I've read the pros and cons and have oscillated between supermarket and branded fuel for years. So, its interesting to read Kremmen post and his conclusion.

I now use either our local Texaco, which has a good reward scheme and the family that own it are so friendly, or our local Asda. I can tell no difference between the fuels, so I shop based on convenience at the time.  :D

Jocko

  • Approved Member
  • *
  • Posts: 6321
  • Country: scotland
  • Fuel economy:
  • My Honda: 2006 GD5 Jazz 1.2 i-DSi S in Vivid Blue Pearl
Re: FUEL
« Reply #4 on: November 15, 2020, 01:48:11 PM »
I felt the car felt slightly livelier when I used 99 RON (possibly just placebo effect) and I saw a marginal improvement in mpg but not enough to justify the increased cost. Hence, I reverted to 95 RON supermarket fuel.

VicW

  • Approved Member
  • *
  • Posts: 1317
  • Country: england
  • My Honda: 11 Plate Jazz 1.4 Ex CVT
Re: FUEL
« Reply #5 on: November 15, 2020, 02:25:58 PM »
Like Kremmen I have carried out extensive long term use of higher octane fuels and my conclusion was that they are not cost effective.
You have got to do several fill-ups before you are running on neat higher octane fuel as it is otherwise being diluted by the lower octane stuff in the tank.

equaliser

  • Approved Member
  • *
  • Posts: 85
  • Country: scotland
  • Fuel economy:
  • My Honda: 2018 Honda Jazz 1.3 I-VTEC EX Navi CVT
Re: FUEL
« Reply #6 on: November 15, 2020, 03:19:34 PM »
Shell V-Power (99 RON) definitely makes a difference on my MK3 CVT, it'll hold onto lower RPM climbing hills. I live up a hill and also my workplace is on a hill, with the standard 95 RON the engine runs at 3000rpm to climb the hills but on 99 RON it'll stay at 2000 rpm at the same speed (40mph). I also felt the difference in torque and sharper throttle response with my previous MK9 Civic which made it nicer to drive. I only do about 4-5000 miles per annum so the additional cost is negligible to me. Your mileage may vary as they say but I'm a believer!

Kremmen

  • Approved Member
  • *
  • Posts: 123
  • Country: england
  • Civinfo interloper
  • My Honda: 2013 Civic EX Auto
Re: FUEL
« Reply #7 on: November 15, 2020, 03:39:04 PM »
Tesco jollop is actually Esso.

Many a time I've seen an Esso tanker at the filling station. You also get Tesco clubcard points at Esso stations so there's some collaboration going on.

I don't have any hills near me and my acceleration is not miles per hour but miles per fortnight so 95 does me nicely.


Just found my post on Civinfo from July 2009:

Quote
I've tried BP Ultimate Super Unleaded (97RON), Tesco High Octane 99RON), normal BP Ultimate (95RON) and normal Tesco unleaded (95RON).

To make the test more realistic, in my case (200 miles a week), I needed to use each for a month to ensure that on the last week I was still not running a cocktail of petrol.

and the results in my 1.8 i-shift = ........................

.............not a blind bit of difference with my mpg staying constant throughout, and no noticeable change in engine smoothness or performance !

The Which? magazine did a similar test with the same results across a range of vehicles.
« Last Edit: November 15, 2020, 03:46:32 PM by Kremmen »
Let's be careful out there!

Westy36

  • Approved Member
  • *
  • Posts: 115
  • Country: gb
  • My Honda: Jazz 1.4 ES 2013 Silver
Re: FUEL
« Reply #8 on: November 15, 2020, 03:57:42 PM »
I felt the car felt slightly livelier when I used 99 RON (possibly just placebo effect) and I saw a marginal improvement in mpg but not enough to justify the increased cost. Hence, I reverted to 95 RON supermarket fuel.

I think thats part of it, the placebo effect. "I've paid more so it must be better"

The only time Ive used 99 RON, is in a car we had that would only run on 99 RON. Back when it was selling for 1.60 a litre and the car did sub 30mpg. Oh how I love the Jazz economy of 50+ mpg and 95 RON at current prices.

Wilderbeest

  • Topic Starter
  • Approved Member
  • *
  • Posts: 11
  • Country: gb
  • My Honda: Mk1 Honda Jazz dsi Sport
Re: FUEL
« Reply #9 on: November 15, 2020, 05:51:56 PM »
I drive my car extremely hard , using all the revs where possible.  And that's where I have noticed the difference , at the performance end of its use.

springswood

  • Bob the Jazz
  • Approved Member
  • *
  • Posts: 304
  • Country: gb
  • Fuel economy:
  • My Honda: Jazz GE3 1.4 Sport 2008
Re: FUEL
« Reply #10 on: November 16, 2020, 10:36:59 AM »
I didn't know my Jazz had a performance end  ;)
"Indecision is a terrible thing"
Or is it? What do you think?

Westy36

  • Approved Member
  • *
  • Posts: 115
  • Country: gb
  • My Honda: Jazz 1.4 ES 2013 Silver
Re: FUEL
« Reply #11 on: November 16, 2020, 11:42:15 AM »
I didn't know my Jazz had a performance end  ;)

 :D 

peteo48

  • Approved Member
  • *
  • Posts: 1920
  • Country: gb
  • I have entered the Jazz Age
  • Fuel economy:
  • My Honda: 2020 Honda Jazz 1.3 EX Navi CVT Shining Grey
Re: FUEL
« Reply #12 on: November 16, 2020, 12:03:17 PM »
Tesco jollop is actually Esso.

Many a time I've seen an Esso tanker at the filling station. You also get Tesco clubcard points at Esso stations so there's some collaboration going on.

I don't have any hills near me and my acceleration is not miles per hour but miles per fortnight so 95 does me nicely.


Just found my post on Civinfo from July 2009:

Quote
I've tried BP Ultimate Super Unleaded (97RON), Tesco High Octane 99RON), normal BP Ultimate (95RON) and normal Tesco unleaded (95RON).

To make the test more realistic, in my case (200 miles a week), I needed to use each for a month to ensure that on the last week I was still not running a cocktail of petrol.

and the results in my 1.8 i-shift = ........................

.............not a blind bit of difference with my mpg staying constant throughout, and no noticeable change in engine smoothness or performance !

The Which? magazine did a similar test with the same results across a range of vehicles.

Pretty sure Greenergy supply both Tesco and Esso so I reckon you are spot on.

olduser1

  • Approved Member
  • *
  • Posts: 1256
  • Country: 00
  • My Honda: Jazz EX 2015 CVT Elite Pack
Re: FUEL
« Reply #13 on: November 16, 2020, 09:47:41 PM »
Maybe its all about driver choice, over 35 years running Subaru's on Shell I found the car travelled further & performance improved.
Swopping over to BP superunleaded a few years ago with 2011 Jazz much better running.
When V Power reached 1.48 p litre changed to Esso .
Current Jazz on Tesco 99 oct @ 1.16 smoother running. its your choice.

bus_ter

  • Approved Member
  • *
  • Posts: 153
  • Country: gb
  • My Honda: 2006 Jazz SE
Re: FUEL
« Reply #14 on: November 22, 2020, 05:30:13 PM »
I occasionally put premium (Shell VPower usually) in the tank. Maybe every 5 or 6 fill ups. I do it for the alleged cleaning properties, figuring it will help keep the engine internals a little cleaner.

I've not noticed any apparent performance or MPG change. If the engine is not tuned to make use of higher RON fuel and tighter timings (which I don't believe it is), then there's no way you will gain any extra performance?

Tags:
 

anything
Back to top