What Petrol To Use
Discussion
aeropilot said:
bad company said:
Wills2 said:
bad company said:
Nothing there or in the handbook to indicate that the car would run better on 98 RON.
My F80 M3 says 98ron at the top and 95 as a minimum, the handbook states all performance data achieved with 98ron fuel, I would have though the 340i would be the same, but clearly not. Looks like it's not tuned for it but of course can run on it.
david-j8694 said:
So the only proof we have then, aside from user calculations and testimonials, is gizlaroc's image showing his 335i (N55 engine?) consistently developed more power on 98RON, whether tuned or stock.
Can't believe BMW don't spell it out in plain English.
They do. Can't believe BMW don't spell it out in plain English.
They say in the owners manual that all figures are when using super unleaded, the car will run on regular unleaded but mpg and power will be reduced.
I even posted a page of the manual a few pages back showing that they have been saying that as far back as the E3x era of cars.
Edit: different thread. It was thread about using 99ron last month.
When I had my 340i I ran it mostly on 98, when on 95 mpg would drop, it was noticeable.
I run V Power even on my Honda not because it will benefit from the anti knocking properties of higher octane but because other additives in the fuel will do my engine no harm and I can afford it.
Use what you fancy, overall extra cost for me is around £190 in a year... easily spent on other useless crap so I spent it on better quality fuel. Each to their own.
I run V Power even on my Honda not because it will benefit from the anti knocking properties of higher octane but because other additives in the fuel will do my engine no harm and I can afford it.
Use what you fancy, overall extra cost for me is around £190 in a year... easily spent on other useless crap so I spent it on better quality fuel. Each to their own.
gizlaroc said:
Here the manual from as far back as the E36 based Z3.....
Of course, just as many cars are not set up to take advantage of 98/99ron.
Super Plus only for me. Of course, just as many cars are not set up to take advantage of 98/99ron.
The handbook for my 2005 3 Series recommends using at least 98 RON whenever possible so 99 RON Tesco Momentun is what it gets even if it can run on 95 or 91 as a last resort.
My other BMW that I won't bother detailing thanks to the grief I've had on here recently tells me to use 98 RON whenever possible and 95 RON as a minimum.
Still there is a simple answer - RTFM!
I always thought it was a bit of a con, filling up with super unleaded or the diesel equivalent. However that was when tanks cost upwards of £70 to fill - you could really feel the difference in your pocket.
For the past few years I’ve used Asda or Tesco standard diesel, and since getting the 30e I’ve continued with standard petrol. However with only a 40 litre tank, and that tank lasting for well over a month, maybe now is the time to try out Super unleaded without a massive hit on the pocket. Has it been disproved that you get more miles out of the equivalent tank? Thanks to the hybrid power it’ll be another 3 weeks before I’m filling up again, but will probably give 98 a go...
For the past few years I’ve used Asda or Tesco standard diesel, and since getting the 30e I’ve continued with standard petrol. However with only a 40 litre tank, and that tank lasting for well over a month, maybe now is the time to try out Super unleaded without a massive hit on the pocket. Has it been disproved that you get more miles out of the equivalent tank? Thanks to the hybrid power it’ll be another 3 weeks before I’m filling up again, but will probably give 98 a go...
gizlaroc said:
They do.
I even posted a page of the manual a few pages back showing that they have been saying that as far back as the E3x era of cars.
I even posted a page of the manual a few pages back showing that they have been saying that as far back as the E3x era of cars.
Yep, my old e39 runs pretty much entirely on Super Unleaded from the local Esso, on the odd occasion that I have to put regular unleaded in the throttle response is noticeably worse and the mpg is even more diabolical than normal! I find supermarket fuel even worse for it. I have an 'oomph' card too which means that super unleaded in the Esso garage is cheaper than the regular stuff.
I had the E350 estate a couple of cars back.
It was the 306hp NA 3.5 litre petrol, that car used to throw a EML using supermarket petrol, well Sainsburys, which was annoying as I was often late to my appointments in London and it was just ff the A11.
So I started using the 99 stuff from Tesco as the Shell was 10 minutes off track, and strangely the car just felt better, now this was a car that said 95ron to be used.
However, it was quite noticeable, so much so I got my mate to rolling road it, fist on 99ron which gave 304hp and then on 95ron, which dropped down to 282 or something like that (I can't remember exactly what they were without digging out the results). but I was quite amazed there was 20hp in it for a NA engine.
I started doing some digging, and after getting hold of a German brochure it said that the E350 Petrol should use Super Benzine Plus, 98ron to achieve the stated figures for mpg and power.
The MPG also went up, I got around 27mpg from it for the first year and then it went up to 30 something once I started using the 99ron, and stayed at that for for the next 18 months.
Funnily enough the guy I sold it to called to ask if I had issues with the NOX sensors, as the EML was on, he again was using supermarket fuel and 95 ron.
I explained I had this and when scanned it said 'misfueled or unknown additive in fuel' and to run it on Shell and even better 99ron.
Mercedes had been swapping out NOX sensors on these cars constantly in the UK, in the states they adjust the parameters so they were not as sensitive.
But that was a NA engine that made a big difference.
My old 2.8i Z3 used to purr liek a sewing machine on 98/99 and sound almost tappety on 95ron, that made a big difference passed 3000rpm on power too.
It was the 306hp NA 3.5 litre petrol, that car used to throw a EML using supermarket petrol, well Sainsburys, which was annoying as I was often late to my appointments in London and it was just ff the A11.
So I started using the 99 stuff from Tesco as the Shell was 10 minutes off track, and strangely the car just felt better, now this was a car that said 95ron to be used.
However, it was quite noticeable, so much so I got my mate to rolling road it, fist on 99ron which gave 304hp and then on 95ron, which dropped down to 282 or something like that (I can't remember exactly what they were without digging out the results). but I was quite amazed there was 20hp in it for a NA engine.
I started doing some digging, and after getting hold of a German brochure it said that the E350 Petrol should use Super Benzine Plus, 98ron to achieve the stated figures for mpg and power.
The MPG also went up, I got around 27mpg from it for the first year and then it went up to 30 something once I started using the 99ron, and stayed at that for for the next 18 months.
Funnily enough the guy I sold it to called to ask if I had issues with the NOX sensors, as the EML was on, he again was using supermarket fuel and 95 ron.
I explained I had this and when scanned it said 'misfueled or unknown additive in fuel' and to run it on Shell and even better 99ron.
Mercedes had been swapping out NOX sensors on these cars constantly in the UK, in the states they adjust the parameters so they were not as sensitive.
But that was a NA engine that made a big difference.
My old 2.8i Z3 used to purr liek a sewing machine on 98/99 and sound almost tappety on 95ron, that made a big difference passed 3000rpm on power too.
I used to help a friend in a single seater racing series a few years ago. Regs were very tight and pump fuel had to be used. He used Shell fuel, on the basis that it gave the highest power and a fellow competitor who worked in the oil/petrol business recommended it.
On a personal note my car was mapped on supermarket fuel on purpose. I add some higher cetane stuff once a month and BMW fuel system cleaner every 6 months.
On a personal note my car was mapped on supermarket fuel on purpose. I add some higher cetane stuff once a month and BMW fuel system cleaner every 6 months.
MitchT said:
Does anyone know if E10 might have any detrimental effect on the B58 engine? I'm thinking of an F32 440i and will happily spend the extra on super unleaded if it's better for the engine, even if there's no noticeable benefit to fuel consumption or performance.
B48 / B58 will run fine on E10 in standard tune. Some re-maps may require 99E5 to get the best out of, and some 'hardcore' remaps may be totally unsuited to anything less than 99RON. I've got a higher performance version on the B48 "30i" tune from the factory. What I do notice is that E5 gives me 5 - 7% better fuel economy than E10 (not surprising really), and of course premium fuels tend to have more / better detergents in them. So I run mine on E5 pretty much all the time. My 987S is even more sensitive - fuel economy is a good 10% better on E5 than E10.
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