Supermarket Fuel

[Cyker]

Normal cars are generally optimized for 95 so there shouldn't be any significant retarded ignition timing. The higher octane rating is of pretty much no consequence unless the car can take advantage of it, e.g. something like my buddy's old riced up Subaru Impreza, or turbo-charged engines.

The main benefit of the 'super' fuels for the likes of us is the cleaning additives and lower ethanol content.

 

I must say I find it surprising how many people here find a significant difference in their hybrids - So far I've found very little noticeable difference between the ones I've tried, with the exception of the Esso E5 super, but that's likely because it's E0 (Or at least was), and even then it was a very small difference, and only to the roughness of the engine when stationary charging. It was a much smaller difference than e.g. the difference I noticed in my Mk1 D4D between supermarket diesel and V-Power diesel, which had a noticeable change in smoothness and power delivery (There was a noticeable loss in low end torque but improvement in top end power).

I'm wondering if it's a freshness issue, e.g. if those of you that are finding significant differences don't drive much, so the increased additives in the Super are keeping it fresh for longer than the E10...?

 

[Derek.w]

I put a additive into the E10 fuel as when I first start up you can hear that it sounds diffrent to normal in the colder climate it only last for less than 30 seconds then the engine sounds normal.

[MikeSh]

6 minutes ago, Derek.w said:

as when I first start up you can hear that it sounds diffrent to normal

But these are variable valve timing engines. The behaviour when you first start is affected by many things and isn't really a good reason to start changing fuels or adding stuff. If it runs OK after a minute or so it's sorted itself out.

[Derek.w]

10 minutes ago, MikeSh said:

But these are variable valve timing engines. The behaviour when you first start is affected by many things and isn't really a good reason to start changing fuels or adding stuff. If it runs OK after a minute or so it's sorted itself out.

It sound more normal and I prefer it that way. Yes if leave it alone it will go away by the time I move onto the main road.

[anchorman]

1 hour ago, Cyker said:

Normal cars are generally optimized for 95 so there shouldn't be any significant retarded ignition timing. The higher octane rating is of pretty much no consequence unless the car can take advantage of it, e.g. something like my buddy's old riced up Subaru Impreza, or turbo-charged engines.

The main benefit of the 'super' fuels for the likes of us is the cleaning additives and lower ethanol content.

 

I must say I find it surprising how many people here find a significant difference in their hybrids - So far I've found very little noticeable difference between the ones I've tried, with the exception of the Esso E5 super, but that's likely because it's E0 (Or at least was), and even then it was a very small difference, and only to the roughness of the engine when stationary charging. It was a much smaller difference than e.g. the difference I noticed in my Mk1 D4D between supermarket diesel and V-Power diesel, which had a noticeable change in smoothness and power delivery (There was a noticeable loss in low end torque but improvement in top end power).

I'm wondering if it's a freshness issue, e.g. if those of you that are finding significant differences don't drive much, so the increased additives in the Super are keeping it fresh for longer than the E10...?

 

They’re optimised as far as you can push 95 but you can get better by using higher octane fuel.  

[anchorman]

1 hour ago, Derek.w said:

I put a additive into the E10 fuel as when I first start up you can hear that it sounds diffrent to normal in the colder climate it only last for less than 30 seconds then the engine sounds normal.

I don’t think that is anything to do with the fuel Derek, there’s a lot happening during warm up. 

[Derek.w]

17 minutes ago, anchorman said:

I don’t think that is anything to do with the fuel Derek, there’s a lot happening during warm up. 

I had the car for nearly 3 years I know what it should sound like on start up.

Toyota will put a additive into your fuel at aditional cost to a service.

[MikeSh]

2 hours ago, Derek.w said:

I had the car for nearly 3 years I know what it should sound like on start up.

No you don't. You just know what it has sounded like for the past three years. There are three years of wear and tear to take into account among other variables.

 

2 hours ago, Derek.w said:

Toyota will put a additive into your fuel at aditional cost to a service.

And McDonald's will supersize your meal at additional cost.

Doesn't mean it's a good thing.

[TonyHSD]

The difference between engine sounds and performance is not related to octane numbers but ethanol quantity and perhaps other additives inside imo. 
Never experienced any noise like that before September 2021 and the new E10 standard with any regular 95 E5 or E0 , or whatever was the standard before that date. Since then the car simply drives unpleasant to say, like underpowered small car. Now I will run the tank down to around 10ltrs again and fill up with E5, I am positive will be a day and night difference especially in the engine noise and pull. 
 

[anchorman]

2 minutes ago, TonyHSD said:

The difference between engine sounds and performance is not related to octane numbers but ethanol quantity and perhaps other additives inside imo. 
 

It is related to octane Tony.  The octane number is a measure of volatility and I can assure you that if you go down the scale you will either introduce knocking or if you !Removed! the timing to avoid knocking (which modern cars do automatically), you will change the engine note.  You can do the same by playing with the distributor on an old car, something I’ve done literally hundreds of times in my mechanicing days.  There may be an additional effect from ethanol but if you do the comparison with ethanol free fuel, you will get very noticeable changes in engine sound.  

[TonyHSD]

2 minutes ago, anchorman said:

It is related to octane Tony.  The octane number is a measure of volatility and I can assure you that if you go down the scale you will either introduce knocking or if you !Removed! the timing to avoid knocking (which modern cars do automatically), you will change the engine note.  You can do the same by playing with the distributor on an old car, something I’ve done literally hundreds of times in my mechanicing days.  There may be an additional effect from ethanol but if you do the comparison with ethanol free fuel, you will get very noticeable changes in engine sound.  

You maybe right. 
I have tried premium fuel before the new standard and did not found  significant improvement in performance, noise or efficiency, however with e5 vs e10 there is real difference, that’s why I put in on the ethanol content. Either way, I like the car how drives on e5 from Tesco more than any others 95 e10, Shell, bp, esso. 
Another interesting thing, before e10 standard I was keeping most of the times a bottle of petrol additive in the boot and when fill up poor quality fuel only 95 but from different garages and noted engine lack of power, I was  adding  some into the tank and noticed immediately improvement, with new e10 95 when I add additives there is no difference, the noise is still there and engine is sluggish. I have tried also this esso 97 e0 down here and it’s very similar to the Tesco I generally use, but price is 15p more. 
 

[anchorman]

10 hours ago, anchorman said:

It is related to octane Tony.  The octane number is a measure of volatility and I can assure you that if you go down the scale you will either introduce knocking or if you !Removed! the timing to avoid knocking (which modern cars do automatically), you will change the engine note.  You can do the same by playing with the distributor on an old car, something I’ve done literally hundreds of times in my mechanicing days.  There may be an additional effect from ethanol but if you do the comparison with ethanol free fuel, you will get very noticeable changes in engine sound.  

Oh I forgot, the filter won’t let me say the opposite of advanced in case it upsets somebody 🙄

[Mastermariner]

We love our Yaris, we also have a Merc E350, a great car but not so practical as the Yaris

We run our 2020 P13 Yaris on E10. Of course with a low octane it needs a couple of extra turns on the starter, having said that we let it idle for a few minutes to get the cylinder temperature up and it drives fine. During the cold weather we add 10 litres of E95. When the Battery began to lose starting power we replaced it with an Exide extra heavy duty stop/start.