93 vs 91?

Padfan9 · 12-01-2020, 03:24 AM

Who has used 93 before? I've never tried it, but I've heard you can feel a difference? How does it work? You mix a little with 91? I have MSR intake, and exhaust. What about mixing 15% E85? Is that different than 93?

spuntyb · 12-01-2020, 04:53 AM

Stock car you won't notice it. I've tuned all of my Bimmers and used maps that work with 93. Definitely feel the difference in that case.

There's more info out there, as well as here in the forums, but this should get you started with mixing e85 in your tank:

https://bmwtuning.co/%E2%80%8Bethano...thanol-blends/

(Also, your sig mentions 8 sp DCT - F90 uses the 8sp ZF torque converter automatic transmission)

pcai · 12-01-2020, 01:22 PM

Can't even get 93 around here, only viable option is shell 91.

Brosef · 12-01-2020, 02:29 PM

all we have in Illinois is 93, so can't make any comparison, but doubt you get any extra power or timing advance vs. 91 on a stock tune

YanoM5 · 12-01-2020, 02:53 PM

I have 92 octane here in WA. I like running a 93 octane tune compared to a 91 octane tune; as I feel butt dyno (still have to do 91 oct logs on draggy) is faster.

In previous cars I've owned. I've ran people with same car and mods, but they had a 91 oct map and I ran the 93 oct map and I always beat them. It's winter here in WA so just to be safe I just run the 91 oct map as I don't want to mess with adding Octane Booster or even E85.

If you're not running a tune yet; I wonder if you could do some logs and see if it helped. Be interested to know.

12-01-2020, 03:24 AM	#1
Padfan9 Sergeant 802 Rep 2,509 Posts Drives: 2022 M8 Competition Coupe Join Date: Jun 2011 Location: San Diego iTrader: (2)	Who has used 93 before? I've never tried it, but I've heard you can feel a difference? How does it work? You mix a little with 91? I have MSR intake, and exhaust. What about mixing 15% E85? Is that different than 93? __________________ '22 F92 M8 Competition Coupe - Frozen Brilliant White \| 8 Speed DCT \| Sakhir Orange/Black Full Leather \| M Perf CF Exterior Package \| M Perf. CF Exhaust \| BBS FI-R 21" Wheels \|
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12-01-2020, 04:53 AM	#2
spuntyb Brigadier General 4055 Rep 4,979 Posts Drives: 2019 F90 Competition Join Date: Aug 2013 Location: USA iTrader: (0)	Stock car you won't notice it. I've tuned all of my Bimmers and used maps that work with 93. Definitely feel the difference in that case. There's more info out there, as well as here in the forums, but this should get you started with mixing e85 in your tank: https://bmwtuning.co/%E2%80%8Bethano...thanol-blends/ (Also, your sig mentions 8 sp DCT - F90 uses the 8sp ZF torque converter automatic transmission) __________________ <b>2023 M5C SRG\|Aragon \|\| 2018 Macan GTS</b> 2019 F90 Comp MBB\|Black (sold) 2018 F80 ZCP TB\|SS (sold) 2015 F30 335 AW\|CR (sold) 2015 F31 MG\|CR (sold) 2011 E90 JB\|Oyster (sold)
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12-01-2020, 01:22 PM	#3
pcai Lieutenant 377 Rep 541 Posts Drives: F90 M5 Join Date: Feb 2020 Location: Canada iTrader: (0) Garage List F90 M5 [0.00]	Can't even get 93 around here, only viable option is shell 91.
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12-01-2020, 02:29 PM	#4
Brosef Brigadier General 875 Rep 3,450 Posts Drives: F90 M5 Join Date: Aug 2009 Location: Chicago iTrader: (4)	all we have in Illinois is 93, so can't make any comparison, but doubt you get any extra power or timing advance vs. 91 on a stock tune
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12-01-2020, 02:53 PM	#5
YanoM5 Captain 504 Rep 673 Posts Drives: 2018 Individual Nardo M5 Join Date: Oct 2015 Location: WA iTrader: (1)	I have 92 octane here in WA. I like running a 93 octane tune compared to a 91 octane tune; as I feel butt dyno (still have to do 91 oct logs on draggy) is faster. In previous cars I've owned. I've ran people with same car and mods, but they had a 91 oct map and I ran the 93 oct map and I always beat them. It's winter here in WA so just to be safe I just run the 91 oct map as I don't want to mess with adding Octane Booster or even E85. If you're not running a tune yet; I wonder if you could do some logs and see if it helped. Be interested to know.
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