Esso Synergy Supreme+ 99 v Shell V Power

I tried it when it was launched.

Usually use Sains Super which I think is 97.

Did not notice any difference. But then I dont drive much these days.

Super going to be the only way to avoid E10 shortly.

 

It would be almost impossible for someone to notice the difference in a road car, using road fuel with the small differences in performance between fuels.

 

never noticed any difference between premium fuels, i think these will be called E5 going forward.

However I remember on my mk1 golf going from premium to standard was a big mistake, car hated it and was a bag of nails. filled up with super and hey presto

 

I only put the decent stuff in my car. You wont get the best out of it if you fill it with crap. IMO of course lol.

 

. I think the you can notice difference in fuels in Megane. I never use normal because car feels lazy/unresponsive. Use Sainsbury’s Super most of time good compromise for price/performance. Use Vpower for trackdays and occasionally on the road, can feel the extra shove, obviously it’s expensive.

 

The effects will 100% be a placebo. The difference will be so small that its only in a chemical laboratory that this will be noticeable. I work in the oil industry and have done so for many years.

 

So your saying the engine performs exactly the same on different types of fuels, there is no difference?

 

No, what I'm saying is the affect is unnoticeable outside of a chemical laboratory. Any gain you may think you have, is a placebo.

But if it makes you all feel better, the thats good

 

When I first got mine I ran it on standard fuel, then later switched to super when I planned on getting it remapped with the usual supporting mods (new intercooler etc..). No perceivable difference between standard or super when stock. Post modding it's remapped on super so obviously I have to stick with that, but i've ran it on Tesco, Shell, Esso, whoever else's super and it makes 0 difference. I stick with Tesco since it's the cheapest and most convenient for me, also happens to be what it was mapped on.

Unless you've got an absolutely mad engine like a forged Evo or Impreza with crazy tight tolerances, a huge turbo and it's mapped to the absolute limit, it won't make a difference. Not putting anyone down but placebo is a hell of a drug. I reckon if I took your car, filled it with another brand of fuel and gave it back, you'd not know any different.

 

Does the ECU not recognise the higher octane fuel and change accordingly? Whether you’d notice it or not I’m not sure. Genuine question I’m sure I’ve heard that from somewhere.

 

It doesn’t make me feel better, I notice the difference is all I’m saying. If I didn’t I wouldn’t say so.

 

Are you saying this on all fuels, as in there will be no noticeable difference between a car running 95ron or VPower ?

I only ask because RS Tuning did a back to back test on a stock FK8 Type-R that turned up with supermarket 95 Ron fuel in, then emptied the tank and filled with V-Power and the car made an extra ~15bhp and more torque.

Not huge gains by any means, but enough for a person driving the same car daily to notice slightly, therefore not a placebo..

I mean they had no reason to make this up and I'm sure there are quite a few variables on a dyno, air temps etc - I am far from an expert and happy to be explained why their test was 'wrong' though.

but the car was 284.7bhp with 95ron and 298.2bhp with V-Power, stock, same dyno, a day or so apart.

 

Not everything will be as it seems.

It is better for humanity that those who subscribe to the marketing remain confident in their knowledge and experience that using a "premium fuel" will have such an affect on their own vehicle it is noticeable.

I, from professional experience, can inform you that no such situation exists outside of a laboratory.

Regarding your dyno picture, my car had over a hp spread over 4 runs, on the same dyno, within minutes. I posted the graph on this forum. It is essentially a pretty picture and nothing more.


This topic has come up on many forums in the past. It always ends the same way. So therefore it is better to say that you are all right, you can all feel the difference between regular fuel and premium fuel and I have absolutely no idea what I'm talking about.

 

Prior to making the pilgrimage from the South Coast up to Leeds to visit RS Tuning for a lot of work, and yet another map, Paul, the owner and mapping genius, made a point to remind me to deliver the car with decent fuel. Decent fuel ie...V Power or at least another 99 Ron fuel to get the best from all the "new shiny" bits that they fitted and to get the most from the mapping. I cannot believe that a well respected and trusted specialist in the tuning business would advise the use of higher octane fuel if it wasn't going to make a difference! This guy knows his stuff, I know others on this forum may prefer to use different specialists, but I'm pretty certain they all would advise using the highest octane fuel before mapping any performance car. On the very odd occasion that I had to put 95 Ron fuel in, my R26 runs like a sack of [emoji90], with noticeably less performance.

Sent from my SM-N986B using Tapatalk

 

You wouldn't believe what these specialists tell people.

I cannot say this clearly enough. I run a very large fuel business. I'm telling you what I'm saying is correct

 

For remapping you need to use super unleaded, otherwise you've got very little headroom as the engine is already mapped to make the most out of standard 95 ron from factory. Then when mapped on super if you stick standard in it will knock, to which point the engine will back the timing off to save itself, significantly reducing performance in doing so. But that's a different discussion entirely, the point is the octane number is the only thing that matters. Brand vs brand of the same octane rating, like Shell V-Power vs Tesco Momentum, makes no difference. Both are 99 ron and both will be indistinguishable from one another.

 

I might start using this

https://www.ebay.co.uk/itm/Gulf-Rac...p2349624.m46890.l6249&mkrid=710-127635-2958-0

 

Race fuels are a completely different ball game.

 

I know nothing about race fuels. How can they achieve above 100 RON? I would have thought that was 100%

 

From running my old Clio 197 and E46 M3 on 95ron then switching to 98ron there was an immediate difference in performance and driveability, so yes I would say you can feel the difference between regular and premium fuels. I doubt you would notice any difference between V-power and BP Ultimate etc.

 

So here is the thing, does anyone know how long it takes to burn through the fuel in your fuel lines?

Does anyone here actually know what octane is used for? And it isn't to give more power.

 

Cleaner to burn?

 

The higher the octane, the more resistant the fuel is to detonation. Most modern engines have pretty high compression ratios, and knock monitoring. My guess is a higher octane fuel allows the ECU to advance ignition timing more before experiencing detonation.
A side effect of fuel not detonating under increased compression/later ignition is increased performance, as the engine ecu is able to utilise more ignition advance....so using a higher octane fuel does give more performance?

 

Also, I would imagine the fuel goes through the fuel rail and lines very quickly, especially if the car uses a fuel rail and pressure regulator that returns unused fuel to the tank.

 

A higher octane fuel is more resistant to knock, so can cope with higher pressure before detonation as you explain.

I never said using a premium fuel wouldn't give an increase in performance.

Ive said, outside of a lab, or a controlled environment if you will, the difference is not noticeable. Any difference is a placebo of the marketing of the product.

Regarding the fuel line, it varies and is longer than you would imagine.

Also it is difficult to determine how much fuel is left in the tank as the accuracy of fuel gauges in cars is questionable at best. So the point I'm making here, you won't know how much "ordinary" fuel you have, so this instant benefit that's spoken if is a placebo. Yes the premium fuel will dilute the amount of ordinary fuel left and make a hybrid mix.

Race cars do not use high octane fuel for the increased horsepower. It is the additional protection against knock is the reason. They also vary the octane level to the weather conditions.

Yes the modern car with independent coil packs can advance and retard the timing accordingly. In fact it does this many times as you increase the revs. By using a premium fuel with a higher octane, the ECU will change the timing accordingly and yes you will receive better performance.

The gain as I've said 4 or 5 times is not noticeable in the real world. Any affect that you think you feel is your brain making you think there is