1/4 tank trick 110 octane plus 3/4 91 =?

MrSoulE93 · 11-23-2008, 01:51 AM

Basically like the title says, got a chance to put in about three gallons of 110 octane to top me off today and i am curious what mix you guys think i will be at. Also just for the record i could feel the difference as soon as i hit the gas pedal! I want to start ordering this stuff now by the 5 gallon barrel

Andrew@ET · 11-23-2008, 01:52 AM

96?

tek818 · 11-23-2008, 02:17 AM

uh oh... not again! AFAIK there is no 110 oct UNLEADED fuel...

SfValley335i · 11-23-2008, 02:22 AM

I thought 110 Octane was only available in Leaded... You might want to double check this because you could be doing harm to your cats.

MrSoulE93 · 11-23-2008, 02:25 AM

hmmm... ill have to check and find out, but lets say it is leaded im I in big trouble i mean it was 1/4 tank??

SfValley335i · 11-23-2008, 02:27 AM

Quote:

Originally Posted by MrSoulE93

hmmm... ill have to check and find out, but lets say it is leaded im I in big trouble i mean it was 1/4 tank??

No your not in BIG trouble... But if you continue using it, you will create yourself a costly problem.

MrSoulE93 · 11-23-2008, 02:33 AM

Continue using it as in with this tank? I'm hoping i don't have to find some way to drain my tank of gas

If it is Leaded then i will sadly never be using it again, i definatly feel more power tho.

dkvby · 11-23-2008, 06:12 AM

i heard if u use it often, it will clog up ur cats .......

JohnnyTT · 11-23-2008, 09:55 AM

If it's leaded...either drain it, or the next couple of times your car gets down to 3/4 tank of gas, fill it up with super at the station. So you can dilute it quickly. Then run down to empty and get that crap out.

kptaylor · 11-23-2008, 11:38 AM

And to answer your original question, the math is pretty basic. You already had the equation:

one quarter of 110 plus three quarters of 91 => .25(110) + .75(91)=95.75 octane

GeorgiaTech335coupe · 11-23-2008, 11:46 AM

If you only put in 1/4, you probably should be fine. I'd fill up when you are down to 3/4. A very well known tuner for Mustangs told my brother he could fill with half and half if wanted and he should be fine. Granted that is for a mustang, but I think you will be alright.

1clean335i · 11-23-2008, 11:50 AM

good excuse to get some catless downpipes when those cats get clogged up now

XLR8MF · 11-23-2008, 11:51 AM

LEADED is bad, bad, bad. The cats are one problem, but even if you are catless you cannot use LEADED. why? Because the problem is the BMW o2 sensors are extremely sensitive and you will destroy them. The lead coats them and then you will have to buy new ones, for each bank, and then install them. Get Vp 109, it is unleaded and wait till you are less than 1/4 tank and run the 5 gallons straight and you will be close to 109 instead of 105. Just a thought.

Dr_Dirt · 11-23-2008, 12:16 PM

3 gals of 110 oct = 330
13 gals 0f 91 oct = 1183
------------------------
total -----------> 1513/16 = 94.56 oct

lawdude · 11-23-2008, 12:32 PM

Quote:

Originally Posted by XLR8MF

Get Vp 109, it is unleaded and wait till you are less than 1/4 tank and run the 5 gallons straight and you will be close to 109 instead of 105. Just a thought.

RON for VP 109 is 109, but R+M/2=105 Octane

XLR8MF · 11-23-2008, 12:57 PM

Quote:

Originally Posted by lawdude

RON for VP 109 is 109, but R+M/2=105 Octane

OK, did not know the 109 was RON. So it is 105? Well power would be the same but you would not be sacrificing your cars components.

11-23-2008, 01:51 AM	#1
MrSoulE93 Private First Class 10 Rep 162 Posts Drives: E93 335i Join Date: Mar 2008 Location: SoCal 818 iTrader: (4) Garage List 2008` 335i [0.00]	1/4 tank trick 110 octane plus 3/4 91 =? Basically like the title says, got a chance to put in about three gallons of 110 octane to top me off today and i am curious what mix you guys think i will be at. Also just for the record i could feel the difference as soon as i hit the gas pedal! I want to start ordering this stuff now by the 5 gallon barrel
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11-23-2008, 01:52 AM	#2
Andrew@ET Brigadier General 200 Rep 4,037 Posts Drives: Red thing Join Date: May 2007 Location: Earth iTrader: (9)	96?
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11-23-2008, 02:17 AM	#3
tek818 Lieutenant Colonel 141 Rep 1,953 Posts Drives: 2020 X3M Competition Join Date: Mar 2007 Location: Los Angeles, CA iTrader: (2) Garage List 2018 M3 ZCP [9.50]	uh oh... not again! AFAIK there is no 110 oct UNLEADED fuel...
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11-23-2008, 02:22 AM	#4
SfValley335i Colonel 174 Rep 2,409 Posts Drives: Current:135i Sold:335i sedan Join Date: Mar 2007 Location: City of Angels iTrader: (8)	I thought 110 Octane was only available in Leaded... You might want to double check this because you could be doing harm to your cats.
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11-23-2008, 02:25 AM	#5
MrSoulE93 Private First Class 10 Rep 162 Posts Drives: E93 335i Join Date: Mar 2008 Location: SoCal 818 iTrader: (4) Garage List 2008` 335i [0.00]	hmmm... ill have to check and find out, but lets say it is leaded im I in big trouble i mean it was 1/4 tank??
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11-23-2008, 02:33 AM	#7
MrSoulE93 Private First Class 10 Rep 162 Posts Drives: E93 335i Join Date: Mar 2008 Location: SoCal 818 iTrader: (4) Garage List 2008` 335i [0.00]	Continue using it as in with this tank? I'm hoping i don't have to find some way to drain my tank of gas If it is Leaded then i will sadly never be using it again, i definatly feel more power tho.
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11-23-2008, 06:12 AM	#8
dkvby ☠☠☠☠☠ 21 Rep 684 Posts Drives: 07 Blk e92 335i Join Date: Aug 2007 Location: HK iTrader: (3) Garage List 2007 335i Coupe [0.00]	i heard if u use it often, it will clog up ur cats .......
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11-23-2008, 09:55 AM	#9
JohnnyTT Captain 34 Rep 750 Posts Drives: 2011 X3 3.5 Join Date: Apr 2008 Location: East Coast iTrader: (0)	If it's leaded...either drain it, or the next couple of times your car gets down to 3/4 tank of gas, fill it up with super at the station. So you can dilute it quickly. Then run down to empty and get that crap out.
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11-23-2008, 11:38 AM	#10
kptaylor First Lieutenant 6 Rep 322 Posts Drives: '07 335i Coupe Join Date: Mar 2007 Location: PHX, AZ iTrader: (0)	And to answer your original question, the math is pretty basic. You already had the equation: one quarter of 110 plus three quarters of 91 => .25(110) + .75(91)=95.75 octane
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11-23-2008, 11:46 AM	#11
GeorgiaTech335coupe Lieutenant Colonel 86 Rep 1,883 Posts Drives: Black BMW 335i coupe Join Date: Mar 2007 Location: USA iTrader: (0)	If you only put in 1/4, you probably should be fine. I'd fill up when you are down to 3/4. A very well known tuner for Mustangs told my brother he could fill with half and half if wanted and he should be fine. Granted that is for a mustang, but I think you will be alright. __________________ Legal Disclaimer: Anything I or anyone else says about my vehicle on this website(e90post.com or any affiliated or nonaffiliated sites), pertaining to modifications, is only to gain acceptance from my/our peers, and does not actually represent anything actually existing on my car, and thus, cannot be held against me in any issues, i.e. warranty claims, that may arise.
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11-23-2008, 11:50 AM	#12
1clean335i Perf BMW mag issue 147, 159 435 Rep 6,799 Posts Drives: Project Estoril Join Date: Feb 2007 Location: Miami, FL iTrader: (31) Garage List 2013 335i M-sport [0.00] 2011 X5 xdrive35i M ... [0.00] 2009 335i M-sport [0.00] 07' 335i Sedan [0.00]	good excuse to get some catless downpipes when those cats get clogged up now __________________ '13 Estoril Blue 335i M-sport *Don't PM me!* Message me here- http://www.facebook.com/ProjectEstoril
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11-23-2008, 11:51 AM	#13
XLR8MF Captain 29 Rep 631 Posts Drives: 335i sedan 2008 Join Date: Oct 2007 Location: Mesa iTrader: (6)	LEADED is bad, bad, bad. The cats are one problem, but even if you are catless you cannot use LEADED. why? Because the problem is the BMW o2 sensors are extremely sensitive and you will destroy them. The lead coats them and then you will have to buy new ones, for each bank, and then install them. Get Vp 109, it is unleaded and wait till you are less than 1/4 tank and run the 5 gallons straight and you will be close to 109 instead of 105. Just a thought.
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11-23-2008, 12:16 PM	#14
Dr_Dirt Major 65 Rep 1,476 Posts Drives: E90 335i 6AT Join Date: Apr 2007 Location: DFW iTrader: (1)	3 gals of 110 oct = 330 13 gals 0f 91 oct = 1183 ------------------------ total -----------> 1513/16 = 94.56 oct
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