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Author Any point using 'performance fuel' in n/a cars?
Ben G
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Registered: 12th Jan 07
Location: Essex
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15th Jun 12 at 22:07   View User's Profile U2U Member Reply With Quote
been using normal 95 ron fuel since i bought the car. just put some tesco momentum (99 ron) in and wondered if there was any point doing so?

i used to run my focus on it and it ran a lot better/smoother but was more smokey.

unsure whether theres any point using it for a long period in the z4.
AndyCorsaSport
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Registered: 12th Feb 06
Location: Horsforth, West Yorkshire
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15th Jun 12 at 22:11   View User's Profile U2U Member Reply With Quote
Supposedly better MPG. I always used V Power in my 182.
SetH
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Registered: 15th Jul 01
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15th Jun 12 at 22:12   View User's Profile U2U Member Reply With Quote
M54 Engine

- The engine is able to adjust automatically to all fuel grades between 87 and 98 octane.
- Anti-knock control automatically adjusts the engine's running conditions to the respective fuel grade and quality.
- Please note that the engine's maximum output is only achieved when running on 98 octane premium fuel.

FYI I run mine on normal super unleaded, don't usually bother with VPOWER

I dont put 95 in.
Ben G
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15th Jun 12 at 22:20   View User's Profile U2U Member Reply With Quote
nice little bit of info there, cheers.

i thought tesco momentum was 99 octane though?

feels quick enough with 95 in anyway.
SetH
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15th Jun 12 at 22:21   View User's Profile U2U Member Reply With Quote
The sticker inside my fuel cap says use 97 only.

I doubt you are making the full 231bhp going on that information but I guess it is probably negligible.
Ben G
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Location: Essex
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15th Jun 12 at 22:25   View User's Profile U2U Member Reply With Quote
good point.

does the engine adjust straight away or would it need a few tank fulls before you get an increase in power?
SportBoy
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Registered: 5th Oct 01
Location: Retford, Nottinghamshire
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15th Jun 12 at 22:28   View User's Profile U2U Member Reply With Quote
ive always been under the impression that there isnt much point with a non turbo.
SetH
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15th Jun 12 at 22:30   View User's Profile U2U Member Reply With Quote
The knock control would retard your ignition timing on 95 octane I would have thought.

I expect pretty much straight away or it would not be a very good system.
Ben G
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15th Jun 12 at 22:33   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by SportBoy
ive always been under the impression that there isnt much point with a non turbo.


thats what i've always been led to believe. it's a lazy 3.0 engine that isn't high strung in the slightest, but just wondered if it would make the car run smoother/less smokey/better fuel economy.
SetH
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15th Jun 12 at 22:33   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by SportBoy
ive always been under the impression that there isnt much point with a non turbo.


You can still get det on an N/A engine although the risk is much less when comparing to a high output turbo application. Any modern engine should be able to adjust via knock control to fuels with differing octane ratings. They really would be minor adjustments in ignition timing.
SetH
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15th Jun 12 at 22:34   View User's Profile U2U Member Reply With Quote
Ben stop putting pikey fuel made for 1.2 8 v corsa's in and fill up with man fuel
Ben G
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15th Jun 12 at 22:35   View User's Profile U2U Member Reply With Quote
just getting some info man. petrol has come down over 12p a litre here so i don't mind paying 5p extra a litre for the good stuff.

[Edited on 15-06-2012 by Ben G]
SetH
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15th Jun 12 at 22:37   View User's Profile U2U Member Reply With Quote
How many miles has you car done Ben?
Ben G
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15th Jun 12 at 22:45   View User's Profile U2U Member Reply With Quote
71k
SetH
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15th Jun 12 at 22:54   View User's Profile U2U Member Reply With Quote
Thats nothing, a prime candidate for supercharging.

320 bhp & 300 bhp/ft for £4.5 k do it
taylorboosh
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Registered: 3rd Apr 07
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16th Jun 12 at 06:58   View User's Profile U2U Member Reply With Quote
lol or sell and spend less than £4k and get a e46 m3 with 340bhp standard?


also setH, so i should be using posh fuel?

on it like a car bonnet tbh
Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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16th Jun 12 at 07:42   View Garage View User's Profile U2U Member Reply With Quote
Won't make any difference performance wise but meant to be better quality fuel, better chemicals etc probably less silicon
Aleex
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Registered: 21st Jul 09
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16th Jun 12 at 08:31   View User's Profile U2U Member Reply With Quote
using 99 ron (high octane) is noticeable in my EK9 over "normal" fuel
Sly_SRi
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Registered: 9th Apr 04
Location: Reading, UK Drives: Corsa C
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16th Jun 12 at 08:35   View Garage View User's Profile U2U Member Reply With Quote
tbh I've not noticed the difference in mine? Seem to perform the same and both seem to cause detonation at certain revs under load.

Corsa C Z20Let

Black Sleeper Turbo Project
Edges 58
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16th Jun 12 at 08:36   View User's Profile U2U Member Reply With Quote
I feel the 330 runs better on 99.. smoother and feels like it has a little more pulling power
Sly_SRi
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Registered: 9th Apr 04
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16th Jun 12 at 08:37   View Garage View User's Profile U2U Member Reply With Quote
Although thinking about it....I've never actually brimmed a tank with high octane fuel, only like 25 litres at a time, so I guess it's not a proper test.

Corsa C Z20Let

Black Sleeper Turbo Project
corsadonk
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Registered: 4th Jul 09
Location: Marlborough, Wiltshire
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16th Jun 12 at 08:48   View Garage View User's Profile U2U Member Reply With Quote
Evo mag, tested the last M5 on super and it made about 2hp difference. The reckon the BMW's do a good job of adjusting the fuel so no point.

On the other cars it made a big difference.
Tiger
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Location: Leicestershire Drives:Astra VXR
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16th Jun 12 at 08:49   View User's Profile U2U Member Reply With Quote
I run 97RON in my BMW 330 and I get 40 miles more on £40 quids worth of fuel over standard 95RON and for my car that's a gallon and a half of fuel so £6-7 of fuel....
Ben G
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16th Jun 12 at 09:36   View User's Profile U2U Member Reply With Quote
Thats not bad. Certainly makes up for the extra money it costs.

Think i'll run it on the better stuff for a month and see if I notice any difference. (about 3 full tanks).
Tiger
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16th Jun 12 at 09:42   View User's Profile U2U Member Reply With Quote
My findings were fairly accurate in terms of I tested over my drive to work (30 miles a day), same route, same weather conditions, same driving style, I tried 3 fuels, supermarket (proved worst by far for fuel economy, worked out more expensive than using 97ron) 95 was my control, then 97RON was where I consistently found far more MPG.

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