My honda jazz likes supermarket petrol

[xoman]

Had my 2009 1.4 ex for a whole year, and been filling it up with shell v power, and I always had this small juddering when I lift off. This on happens, if I didn't lift off the clutch at the exact way that the engine wanted it.

I always thought hat was an issue with the engine or clutch or something.

that is until I started filling it up with cheap sainbury's supermarket fuel 3 months ago, and all of a sudden, the small juddering disappeared completely!

Does anyone have similar issue?

PS.
unforunately someone bumped into the back of me, and the car is a write off... now I am looking for a new honda jazz...

[equaliser]

Yes, I noticed this behaviour in my 1.4 Civic (same engine as your Jazz), I still used V-Power mostly as the engine seemed smoother and the low speed torque was better - well that is what I thought!

[FordPrefect8]

Had my 2009 1.4 ex for a whole year, and been filling it up with shell v power, and I always had this small juddering when I lift off. This on happens, if I didn't lift off the clutch at the exact way that the engine wanted it.

I always thought hat was an issue with the engine or clutch or something.

that is until I started filling it up with cheap sainbury's supermarket fuel 3 months ago, and all of a sudden, the small juddering disappeared completely!

Does anyone have similar issue?

PS.
unforunately someone bumped into the back of me, and the car is a write off... now I am looking for a new honda jazz...

Do you use a lot of injector cleaners like Redex or Techron?

[peteo48]

Ah - the old supermarket fuel debate!

I admit I am as neurotic about this as the next OCD sufferer.

[culzean]

Ah - the old supermarket fuel debate!

I admit I am as neurotic about this as the next OCD sufferer.

Fuel is like religion and politics - should not be discussed on forums.

My mate suffers from CDO,  he says it is like OCD but the letters are in alphabetical order - just as they should be.

[equaliser]

Ah - the old supermarket fuel debate!

I admit I am as neurotic about this as the next OCD sufferer.

I know but the CVT definitely holds onto ratios better on V-Power, it climbs hills around me without changing down which it doesn't do on ordinary 95RON petrol so I'm a believer!

[culzean]

Yes, I noticed this behaviour in my 1.4 Civic (same engine as your Jazz), I still used V-Power mostly as the engine seemed smoother and the low speed torque was better - well that is what I thought!

That is what my wife thought as well, and she didn't even know I had filled her Jazz up with V-power instead of her normal supermarket fuel. She asked me if i had 'tuned' her car.

[peteo48]

Ah - the old supermarket fuel debate!

I admit I am as neurotic about this as the next OCD sufferer.

I know but the CVT definitely holds onto ratios better on V-Power, it climbs hills around me without changing down which it doesn't do on ordinary 95RON petrol so I'm a believer!

Yes - I can get that because in addition to any additives V Power might have, it is a high octane fuel.  I guess the real debate is between, say, Sainsbury's 95 RON and Shell's 95 RON but the debate is never framed in that way. I can completely accept that V Power is a superior fuel but is branded 95 RON better than supermarket 95 RON?

Culzean is right. It's a "politics and religion" thing.

[equaliser]

I've never noticed any difference between supermarket and branded 95RON petrol.

[xoman]

Had my 2009 1.4 ex for a whole year, and been filling it up with shell v power, and I always had this small juddering when I lift off. This on happens, if I didn't lift off the clutch at the exact way that the engine wanted it.

I always thought hat was an issue with the engine or clutch or something.

that is until I started filling it up with cheap sainbury's supermarket fuel 3 months ago, and all of a sudden, the small juddering disappeared completely!

Does anyone have similar issue?

PS.
unforunately someone bumped into the back of me, and the car is a write off... now I am looking for a new honda jazz...

Do you use a lot of injector cleaners like Redex or Techron?

No, I didn't put any of those in there at all.

[FordPrefect8]

Nevermind then, I have noticed that using some additives in premium fuel (Shell, Esso and BP) can have negative effects so what you describe is exactly what I would observe if that was the case.

[madasafish]

I've never noticed any difference between supermarket and branded 95RON petrol.

Ditto. And I keep extensive records and find zero difference in fuel consumption.
So as far as I am concerned, the facts say it is not worthwhile.

[peteo48]

https://www.asda.com/about/instore/petrol-stations

Thought this was interesting. Asda going on the attack about their fuels indicating that they exceed UK and European standards and stating "There is no such thing as supermarket fuel."

Actually Asda is the one supermarket fuel I've never used - not out of choice necessarily but I don't live near one of their fuel stations.

[Jocko]

As the link says:

Adding Extra
Testing fuel for quality is only part of the process. Asda fuel includes specially formulated additives and detergents, which keep your engine clean and improve engine efficiency.

Fights harmful deposits / protects your engine:

Protects the intake system in the engine by forming a protective fluid film, which prevents the build-up of deposits and can remove existing deposits. The dispersants help stop the build-up of contaminates
Has detergents which help clean the inside of the engine
Has anti-corrosion agents which protect metallic parts
Improves performance / helps restore fuel economy:

The cleaning additives can help restore power. When the injectors are cleaned, they work efficiently and can provide maximum flow and a fine spray needed for the efficient combustion of fuel

I think you will find that the other major supermarket chains supply exactly the same product.

[equaliser]

https://www.asda.com/about/instore/petrol-stations

Thought this was interesting. Asda going on the attack about their fuels indicating that they exceed UK and European standards and stating "There is no such thing as supermarket fuel."

Actually Asda is the one supermarket fuel I've never used - not out of choice necessarily but I don't live near one of their fuel stations.

I've used Asda in many different cars over the years and it's just the same driving experience as all the rest of the 95RON suppliers.