Sainsburys Super, thoughts?

[pscl227]

What are other peoples thoughts on this?

I normally use V power or what ever its called now, but in a squeeze the other day I filled up the M5 with a tank of Sainsburys super.

I don't normally pay too much attention to fuel, other than stick v power in and my car works. But, after driving around town with the Sainsburys Super, I noticed at idle it's fluctuating between 900 - 1100rpm, and when I accelerate away from a standing stop there is a noticible stop in the engine before it kicks in again.

Now I have another tank of v power in, and all the symptoms are gone, but is this normal, surely it should not be so noticible?

P

[MarkwG]

I think Sainsburys is a slightly lower octane rating, 97 vs 99, it may ahve been adapting to that?

[pscl227]

MarkwG said:

I think Sainsburys is a slightly lower octane rating, 97 vs 99, it may ahve been adapting to that?

I understand it may need to change the map, but surely the effects should not have been so dramatic, and you would expect it to run smoother after maybe 50 miles, but this continued for around 200 miles!

[EssexIan]

My old E39 M5 always ran well on V power but less so on Sainsbury's and Tesco super juice and Tesco super juice was supposed to be 99 octane also. I think the difference you feel may be more to do with actual composition than octane number. I know for certain that at the time Tesco super (Momentum) contained a higher content of ethanol than anything else on the market at the time. V power was a standard 97RON blend with a special Shell additive package that almost certainly contained some form of octane booster and something to control how it burned. I think it is the different characteristics of how different fuels burn that changes our perception of how the cars feel.

Ian

[JMRS4]

I ran Sainsburys 97 Ron in the new 2013 M5 I had for 4 days, I did 510 miles in it and it ran great, returned 26MPG too.
Thats mixed driving not all in one day stuff.
I am not sure why your car "Played up", but the 97 Ron Stuff in ~Sainsburys seemed good to me.
Mine arrives in September (LCI M5) and I intend to use it.

[ratty6464]

Mine runs awfully on V power Nitro (completely differently to how it ran with the previous v power). This is well documented on M3 Cutters.

Surprisingly I've started using Sainsbury's Super and it runs so much better - no rev hunting on startup and no Kangarooing when cold.

[MikeHull]

My E39 M5 runs nicely on V Power Nitro. ticks over steadily at 600rpm when warm.

[Owlwood]

ratty6464 said:

Mine runs awfully on V power Nitro (completely differently to how it ran with the previous v power). This is well documented on M3 Cutters.

Surprisingly I've started using Sainsbury's Super and it runs so much better - no rev hunting on startup and no Kangarooing when cold.

Interesting, think i'll have to check out that thread. Only had my M3 2 months but i've only run v-power nitro.

[ndj]

ratty6464 said:

Mine runs awfully on V power Nitro (completely differently to how it ran with the previous v power). This is well documented on M3 Cutters.

Surprisingly I've started using Sainsbury's Super and it runs so much better - no rev hunting on startup and no Kangarooing when cold.

+1

[quavey]

I've had no problems with Sainsburys super in my E39 M5 although I do use a mixture of V power and sainsburys depending on which is nearest! Although Sainsburys is considerably cheaper

[Boogsie]

I read on the internet (so it *must* be true) that supermarket fuel - with the exception of tesco's momentum - comes from different sources. This is either geographic or economically based. Some garages will be filled up based on what the cheapest 97 is at the time, but some use a local supplier that gives fairly good rates. The thing is there is no way to know what you're putting into your car unless you know the station's manager.

Branded stations are different, as they will always use their brand. And apparently momentum is different too as it comes from a single supplier.

[fatmansv8]

Hi I to noticed that since I started using v power nitro in my E39 M5 it has not ran as well as the original v power. It has a steady 600 rpm idle though no hunting going on just seems a tad sluggish not as lively as the original v power. Tried BP ultimate no different to v power nitro. I'm confused.com lol