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F10 / F11 (2011 - Current)
The new chapter in the highly successful story of the BMW 5 Series Sedan (F10) and wagon (F11)

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  #1  
Old 01-22-2012, 10:28 AM
kckc1016 kckc1016 is offline
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What type of gas do you fill up with?

Just curious to know if any of you guys put below 93 grade in your 5's. I got a 535 and ive put nothing but 93 in them but seems like some have put 87. Any drawbacks to putting regular in?
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  #2  
Old 01-22-2012, 10:30 AM
DerStig DerStig is offline
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Originally Posted by kckc1016 View Post
Just curious to know if any of you guys put below 93 grade in your 5's. I got a 535 and ive put nothing but 93 in them but seems like some have put 87. Any drawbacks to putting regular in?
Never, 91 at a minimum.
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  #3  
Old 01-22-2012, 10:34 AM
jimefam jimefam is offline
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Always 93 but occasionally when its running super low I'll throw some VP100 or MS109 in there and drive the hell out of it for a while.
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  #4  
Old 01-22-2012, 11:28 AM
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Needsdecaf Needsdecaf is offline
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Originally Posted by jimefam View Post
Always 93 but occasionally when its running super low I'll throw some VP100 or MS109 in there and drive the hell out of it for a while.
Does the ECU respond well to increased octane? I know that not all engines will advance timing and spark beyond what 93 will allow.

My Volvo R responded VERY well to increased octane levels. Guys would run Torco additive, which worked well but left a reddish film on the tailpipes...which means who knows where else it was leaving a film.

Guys running race gas used to call it "cracktane", lol. The added pull was noticeable.
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  #5  
Old 01-22-2012, 11:35 AM
jimefam jimefam is offline
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Originally Posted by Needsdecaf View Post
Does the ECU respond well to increased octane? I know that not all engines will advance timing and spark beyond what 93 will allow.

My Volvo R responded VERY well to increased octane levels. Guys would run Torco additive, which worked well but left a reddish film on the tailpipes...which means who knows where else it was leaving a film.

Guys running race gas used to call it "cracktane", lol. The added pull was noticeable.
It does seem to enjoy the race fuel, when the local track opens up I'd like to test and see if it really does add power or if it's a placebo effect but subjectively I'd say it makes a difference.
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  #6  
Old 01-22-2012, 11:44 AM
DerStig DerStig is offline
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I am so nice that even when I get a 328 loaner, I put 93 octane.
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  #7  
Old 02-11-2012, 02:40 PM
jimefam jimefam is offline
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Quote:
Originally Posted by Needsdecaf View Post
Does the ECU respond well to increased octane? I know that not all engines will advance timing and spark beyond what 93 will allow.

My Volvo R responded VERY well to increased octane levels. Guys would run Torco additive, which worked well but left a reddish film on the tailpipes...which means who knows where else it was leaving a film.

Guys running race gas used to call it "cracktane", lol. The added pull was noticeable.
Quote:
Originally Posted by jimefam View Post
It does seem to enjoy the race fuel, when the local track opens up I'd like to test and see if it really does add power or if it's a placebo effect but subjectively I'd say it makes a difference.
Thought I'd bump this for some data, today was the first test and tune at one of my local tracks so I drove the 2 hrs to the track. I barely had fuel left when I got there as the idea was to get some runs in with 93 octane and then with VP's MS109(chose it because I thought it would give me the greatest differential) so I make the first couple of passes which ranged from horrible(1st pass was 13.7@109.18) to best(13.09@109.65) then I was out of fuel to where range to empty literally said ---. I put 3 gallons of race fuel in and make the first pass. Now I had expected to see everything the same while the dme adapted but I ran 13.4@108.18! WTF? So I said it must take time adapt but I ran 9 more passes and the best I could muster was 13.28@108.35 with my best 60' ever of 2.074. I dropped about 1.5mph of trap speed and I have NO idea why. Now that may seem like a little but as a reference my friend who has a 2011 550i just like mine(on 20" also) except he has the dinan stage 2 ran his car and had a top trap speed of 111.5. So he ran just over 1.8mph faster than me with what's supposed to be a 100hp difference. I'm not sure why the difference it could be the oxygenated fuel or it may be nothing but I found it interesting and unexpected none the less.
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  #8  
Old 02-11-2012, 03:43 PM
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dunderhi dunderhi is online now
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I'm bit confused by your oxygenated fuel comment. Were you using MS109E or was you or your friend running some other type oxygenated fuel? Maybe the MS109 tripped an engine safety feature.

Today's cold weather should have been challenging for traction, but great for some additional power. What was your friends best 60', qtr/trap combination under these conditions.
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  #9  
Old 01-22-2012, 10:36 AM
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93 at a minimum
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  #10  
Old 01-22-2012, 10:53 AM
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Always 93.
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  #11  
Old 01-22-2012, 11:07 AM
PeterC4 PeterC4 is offline
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If you put in less than the minimum octane level consistently, the check engine light may go on, indicating a fault code has been thrown up....could be P1384 - I've had this happen on my 328 and diagnosed it with by OBD II reader. You will only know this (and what it means) if you have a OBD II reader that can tell you the fault code and re-set it, otherwise the light may just stay on. And it may cost you a trip to the dealer to get it checked out and turned off - and that won't be cheap. Less than minimum octane will ultimately cause engine knock but could affect performance too. Not worth it.
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  #12  
Old 01-22-2012, 10:59 AM
ihumphrey ihumphrey is offline
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Always 93 unless I am somewhere where it is not available...then 91 or 92
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  #13  
Old 01-22-2012, 11:25 AM
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Needsdecaf Needsdecaf is offline
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I would never put less than 91 in a turbo engine. Fortunately, we have 93 here.
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  #14  
Old 01-22-2012, 11:31 AM
salamigs salamigs is offline
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Can't get 93 here, so 91 it is. Would not put anything less...
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  #15  
Old 01-22-2012, 11:34 AM
yogi799 yogi799 is offline
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Wow... Our premium is 91, I thought this was good enough... Now, I'm confused hearing so many put 93 in. We only have 93 at very few stations, not to mention the cost...
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  #16  
Old 01-22-2012, 11:47 AM
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Needsdecaf Needsdecaf is offline
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Quote:
Originally Posted by yogi799 View Post
Wow... Our premium is 91, I thought this was good enough... Now, I'm confused hearing so many put 93 in. We only have 93 at very few stations, not to mention the cost...
Many areas in the US (Western mostly) have 3 grades. 87, 89, 91. Other areas, Eastern mostly, have 87, 89, 93.
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Heaven is where the police are British, the cooks are French, the cars are German, the lovers are Italian and it is all organised by the Swiss.

Hell is where the police are German, the cooks are English, the cars are French, the lovers are Swiss, and it is all organised by the Italians
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  #17  
Old 01-23-2012, 06:00 PM
gicamuci gicamuci is offline
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Originally Posted by yogi799 View Post
Wow... Our premium is 91, I thought this was good enough... Now, I'm confused hearing so many put 93 in. We only have 93 at very few stations, not to mention the cost...
Aren't any 'Petro Canada' gas stations in Toronto ? I'm sure there are. You can get 94 at them
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  #18  
Old 01-23-2012, 07:23 PM
Calgary Agent Calgary Agent is offline
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Originally Posted by gicamuci View Post
Aren't any 'Petro Canada' gas stations in Toronto ? I'm sure there are. You can get 94 at them
Petro Canada stations (now owned by Suncor) do not offer any higher octane than 91 in western Canada (AB & BC). In AB the highest octane you can get is 91, unless you use Husky's ethonal blended 93. Chevron statiions in BC offer 93 (non ethanol).
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  #19  
Old 01-23-2012, 09:11 PM
yogi799 yogi799 is offline
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Originally Posted by gicamuci View Post
Aren't any 'Petro Canada' gas stations in Toronto ? I'm sure there are. You can get 94 at them
I know, but 1) is 94 really required and much better for the engine in the long run over 91, and 2) is whatever is the answer to #1 worth the increased cost of the 91 octane (plus being stuck with Petro Canada for good).

Any insights...?
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  #20  
Old 01-23-2012, 10:04 PM
Sophisto Sophisto is offline
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Obviously I put in diesel, there are a couple of types offered around, with claims for more miles per gallon and oe cleaner combustion.
I have not been able to find any difference in between them.
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  #21  
Old 01-22-2012, 11:58 AM
Kmdcolo Kmdcolo is offline
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Colorado only offers 85, 87, and 91. Ralph Schomp BMW said 87 works fine because of our elevation, but I only run 91.
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  #22  
Old 01-22-2012, 12:21 PM
DerStig DerStig is offline
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If I didn't have 93 octane here, I'd just move.

And no, 87 octane is not okay in these engines!!!!!
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  #23  
Old 01-22-2012, 12:58 PM
Quacker Quacker is online now
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Originally Posted by Kmdcolo View Post
Colorado only offers 85, 87, and 91. Ralph Schomp BMW said 87 works fine because of our elevation, but I only run 91.
Low octane works in a normally aspirated motor at higher altitudes, but not in a turbocharged motor. I'm sure that the car can and will compensate for low octane in that it will not knock, but your performance will suffer.
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  #24  
Old 01-22-2012, 01:05 PM
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BobRBob BobRBob is offline
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I use 91 consistently. Higher octane is very rare around here. I always use Shell V-Power as it is the only gasoline available that does not contain ethanol.
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  #25  
Old 01-22-2012, 02:34 PM
ihumphrey ihumphrey is offline
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Originally Posted by BobRBob View Post
I use 91 consistently. Higher octane is very rare around here. I always use Shell V-Power as it is the only gasoline available that does not contain ethanol.
Our vpower is 93 here...I thought it had ethanol though, I will have to pay attention at the next fill-up.
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