Just a,quick one. Anyone notice a marked difference in the 3.0si with super, on performance and economy? Or do most do as I do which is give a boost of 98 every couple of tankfulls. Not done on the Coupe yet, hence is it worth the extra bucks.
D
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95 or 98 RON?
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Z4 COUPSTER
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95 or 98 RON?
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Smartbear
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95 or 98 RON?
You won’t see a noticeable improvement increase on a normally aspirated engine but it’s the engine cleaning detergent properties of super unleaded which are worth having-lots on here about this topicZ4 COUPSTER wrote: ↑Wed May 16, 2018 1:51 pm Just a,quick one. Anyone notice a marked difference in the 3.0si with super, on performance and economy? Or do most do as I do which is give a boost of 98 every couple of tankfulls. Not done on the Coupe yet, hence is it worth the extra bucks.
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Rob
e89 Sdrive 20i, plenty of mumbo & good economy-the thinking bears z4
e89 Sdrive 30i, this ones busted, pass me another...
e85 3.0si sold
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Z4 COUPSTER
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95 or 98 RON?
Thanks bud. Tbh I normally throw a tank full in once in a while. It never hurts that's for sure. I'll search nxt time.
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andyf1140
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95 or 98 RON?
It really depends on the engine management system, if it can tune the fueling and timing based on the lambda and anti-knock sensors then you will see a difference in performance and economy. The question is how intelligent are the BMW ECU's 
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hopz121
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95 or 98 RON?
98 always for me either V Power or Momentum 
Well worth the extra IMO
Well worth the extra IMO
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ph001
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95 or 98 RON?
EXTRA! EXTRA!... read all about it... viewtopic.php?f=2&t=102010&hilit=octane
2007 E85 Z4 3.0Si manual 
19" CSL's | Eibach Springs | Aeroskirts | Z4M front bumper | Clear brake light | ZHP | RCH+| Stubby
2004 E46 M3 coupe manual - gone but not forgotten.
19" CSL's | Eibach Springs | Aeroskirts | Z4M front bumper | Clear brake light | ZHP | RCH+| Stubby
2004 E46 M3 coupe manual - gone but not forgotten.
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Z4 COUPSTER
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95 or 98 RON?
Cheers.ph001 wrote: ↑Wed May 16, 2018 2:29 pm EXTRA! EXTRA!... read all about it... viewtopic.php?f=2&t=102010&hilit=octane
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JamieZ4C
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95 or 98 RON?
Shell V Power for me. There's a Shell garage on the way out of my village, so it's very convenient, and the extra cost is negligible when my annual mileage of <3000 is taken into consideration. So a no-brainer for me and my circumstances.
Plus when pedal goes to metal I like to think that I didn't leave any of the horses in the stable!
Plus when pedal goes to metal I like to think that I didn't leave any of the horses in the stable!
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RickRob
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95 or 98 RON?
I always put Shell V Power or BP Ultimate in the Zed and the Cooper S. The Discovery makes do with normal diesel.
With 98 grade you get the pops in the exhaust on over run, but not with 95 grade.
With 98 grade you get the pops in the exhaust on over run, but not with 95 grade.
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ph001
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95 or 98 RON?
Interesting observation...I've got 95 RON in at the moment so I will see if mine is same.
2007 E85 Z4 3.0Si manual
19" CSL's | Eibach Springs | Aeroskirts | Z4M front bumper | Clear brake light | ZHP | RCH+| Stubby
2004 E46 M3 coupe manual - gone but not forgotten.
19" CSL's | Eibach Springs | Aeroskirts | Z4M front bumper | Clear brake light | ZHP | RCH+| Stubby
2004 E46 M3 coupe manual - gone but not forgotten.
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ErrErrminator
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95 or 98 RON?
Sorry - double post! 
Last edited by ErrErrminator on Wed May 16, 2018 3:57 pm, edited 1 time in total.
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ErrErrminator
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95 or 98 RON?
I'm on my second tank since collecting my 2.5 and so far I have just used standard 95. I will probably put a tank of 98 through it once in a while. With the exhaust back-box mod on mine with boggo 95 it pops and crackles like a good-un anyway. Maybe with the 98 it'll go one step further and spit flames!
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R60BBA
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95 or 98 RON?
I don’t notice a difference in power but I do in economy.
The exhaust note is also louder with V Power.
The exhaust note is also louder with V Power.
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RustyZ4
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95 or 98 RON?
I have run my 2.8 on both, and definitely get better MPG on 98 RON, cant say I notice any power difference,
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Z4 E85 3.0, gone but now with son
Growing Old is Mandatory But Growing Up is Optional
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Z4 COUPSTER
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95 or 98 RON?
This is,what I was thinking. Noticed a lot on previous cars with economy and a little more punch.
Z in da Head.3.0i Z3 sport,sapphire black,3.0i Z4 roadster Sterling grey,auto,Z4 3.0si Coupe Titanium silver,Stubby &B06 Plus some other German beauties!!