Regular gas

HanM3 · 01-10-2010, 04:43 PM

I accidently put in about 10.00 dollars of regular unleaded gas...its cool right?

zuggerat89 · 01-10-2010, 04:44 PM

I think the ECU will automatically retard the timing and power to compensate but I def would not do it more than once, haha.

HanM3 · 01-10-2010, 04:57 PM

Does it do damage?

e46e92love · 01-10-2010, 04:58 PM

Quote:

Originally Posted by alpha-3

I accidently put in about 10.00 dollars of regular unleaded gas...its cool right?

I don't build these cars, nor program their ECUs, but my bet was if after the 10 of regular (what like 3 gallons?) if you put in 93, she will be fine so don't lose sleep over it.

Cheers,
e46e92

MysticBlue · 01-10-2010, 05:22 PM

Nope, no damage. Don't worry about it. Engine takes care of itself. Slightly less performance but probably nothing you would notice in regular street driving. Your mileage might be affected, but again, barely noticeable.

yoyeewee · 01-10-2010, 08:15 PM

My friend experimented with his 2006 M6 by filling it up with regular 87 octane gas a few times...under normal driving there was no noticeable difference.

///V\3Dude · 01-10-2010, 08:42 PM

I've done it before to, don't worry i accidentally filled up 15 dollars worth of 89 oct. Car drove fine, i barely notice anything. No damage was done either. I just drove economically:-)

RichB · 01-10-2010, 08:50 PM

I remember reading the HP will be reduced by 5-10% on the 335i. Can't recall where I read it though. Car will be fine as the computers will compensate for the lower octane.

Dartanium · 01-10-2010, 10:26 PM

Quote:

Originally Posted by TrackRat

Expect BMW factory engineers to show up at your residence and take the M3 back from you.

I agree with this guy

but seriously top off rest of the tank with 91/93, no worries

Singletrack · 01-10-2010, 10:42 PM

I wouldn't push it until you cycle that gas out of there. The ECU will detect knock and retard the ignition timing, reducing power.

quality_sound · 01-11-2010, 12:51 AM

I wouldn't even worry about topping it off. It's not like it'll start knocking with how cold it is anyway. Well, for everyone but those in SoCal where's it's in the 70. Even then it's not a big deal. Just don't make it a habit.

smmmurf · 01-11-2010, 01:29 AM

If 3 out of 17 gallons are 87 and the rest is 91, you end up with 90.3 octane. Don't worry about it.

spyderco10 · 01-11-2010, 01:33 AM

just fill the rest up with race fuel 110 octane, and you'll be fine

schnell325 · 01-11-2010, 01:52 AM

Quote:

Originally Posted by spyderco10

just fill the rest up with race fuel 110 octane, and you'll be fine

Winning answer!

smmmurf · 01-11-2010, 02:58 AM

Quote:

Originally Posted by schnell325

Winning answer!

...as long as it's not leaded. I'm not aware of a 110-octane unleaded fuel that is sold at the pump in SoCal. Most unleaded race fuel is 100.

rsmamg · 01-11-2010, 03:03 AM

wont do anything noticeable, imo

quality_sound · 01-11-2010, 03:10 AM

Quote:

Originally Posted by spyderco10

just fill the rest up with race fuel 110 octane, and you'll be fine

Talk about your massive wastes of money.

PunjabiM3 · 01-11-2010, 12:01 PM

lol. If it were my car I would fill the rest up with premium to offset the 87 (as others have mentioned already).

BPMSport · 01-13-2010, 02:37 AM

If you wanted to, you could fill the entire tank of the M3 with 87 octane gas. The engine would not fall apart. The ECU has 87 octane fallback programming, not to mention a state of the art knock detection system. It will only cause a loss in performance.

Fill it up with 91 to bring the total level up, and you'll be fine. We had a customer complain about our tune only to find out that he was filling up with 87 octane gas on the regular... He was surely surprised driving it with 91

.

01-10-2010, 04:43 PM	#1
HanM3 Private 9 Rep 53 Posts Drives: 2009 m3 space gray coupe Join Date: Aug 2007 Location: oc iTrader: (0)	Regular gas I accidently put in about 10.00 dollars of regular unleaded gas...its cool right?
	Appreciate 0 Tweet Quote

01-10-2010, 04:44 PM	#2
zuggerat89 Still waiting... 25 Rep 887 Posts Drives: OGV Join Date: Jan 2006 Location: Monmouth County, NJ iTrader: (0)	I think the ECU will automatically retard the timing and power to compensate but I def would not do it more than once, haha.
	Appreciate 0 Quote

01-10-2010, 04:57 PM	#3
HanM3 Private 9 Rep 53 Posts Drives: 2009 m3 space gray coupe Join Date: Aug 2007 Location: oc iTrader: (0)	Does it do damage?
	Appreciate 0 Quote

01-10-2010, 05:22 PM	#5
MysticBlue Lieutenant Colonel 369 Rep 1,887 Posts Drives: '20 M5C, '09 M3 DCT Coupe Join Date: Apr 2008 Location: Eastern Oregon... They call 'em rigs here iTrader: (0)	Nope, no damage. Don't worry about it. Engine takes care of itself. Slightly less performance but probably nothing you would notice in regular street driving. Your mileage might be affected, but again, barely noticeable.
	Appreciate 0 Quote

01-10-2010, 08:15 PM	#6
yoyeewee Major 107 Rep 1,052 Posts Drives: 2007 BMW M6 coupe Join Date: Jul 2007 Location: Orange County, CA iTrader: (0) Garage List 2007 BMW M6 [0.00] Previous Ride 2006 ... [0.00] Previous Ride 2007 ... [8.00]	My friend experimented with his 2006 M6 by filling it up with regular 87 octane gas a few times...under normal driving there was no noticeable difference. __________________ 2008 335i coupe Atlantic Blue with Black Leather Steptronic ZSP ZPP NAV PDC COMFORT ACCESS REAR SUNSHADE HEATED SEATS HD RADIO SIRIUS USB/IPOD 20" Klassen K5.1 3-piece wheels w/Toyo Tires Job Design Body Kit M3 Trunk Spoiler Eisenmann Exhaust Eibach Pro-Kit Springs
	Appreciate 0 Quote

01-10-2010, 08:42 PM	#7
///V\3Dude I Drive Slow To Save Gas :D $///V\3Dude's Avatar$ 26 Rep 464 Posts Drives: 08 M3, MY11 STi Join Date: Jul 2009 Location: I <3 NY iTrader: (2)	I've done it before to, don't worry i accidentally filled up 15 dollars worth of 89 oct. Car drove fine, i barely notice anything. No damage was done either. I just drove economically:-) __________________
	Appreciate 0 Quote

01-10-2010, 08:50 PM	#8
RichB Private First Class 7 Rep 156 Posts Drives: 2010 M3 e90 Join Date: Nov 2009 Location: St. Louis, MO iTrader: (0)	I remember reading the HP will be reduced by 5-10% on the 335i. Can't recall where I read it though. Car will be fine as the computers will compensate for the lower octane.
	Appreciate 0 Quote

01-10-2010, 10:42 PM	#10
Singletrack 4th down; 4th quarter? Renegade. 87 Rep 3,850 Posts Drives: 09 SSII E92 M3; 19 FG M5C Join Date: Aug 2008 Location: Pittsburgh, PA iTrader: (3)	I wouldn't push it until you cycle that gas out of there. The ECU will detect knock and retard the ignition timing, reducing power.
	Appreciate 0 Quote

01-11-2010, 12:51 AM	#11
quality_sound 8 tracks of madness 62 Rep 2,735 Posts Drives: Slowly Join Date: Jun 2009 Location: At home iTrader: (1)	I wouldn't even worry about topping it off. It's not like it'll start knocking with how cold it is anyway. Well, for everyone but those in SoCal where's it's in the 70. Even then it's not a big deal. Just don't make it a habit.
	Appreciate 0 Quote

01-11-2010, 01:29 AM	#12
smmmurf Colonel 309 Rep 2,189 Posts Drives: E92 M3 DCT 353k+ miles Join Date: Feb 2008 Location: Half Moon Bay, CA iTrader: (7)	If 3 out of 17 gallons are 87 and the rest is 91, you end up with 90.3 octane. Don't worry about it.
	Appreciate 0 Quote

01-11-2010, 01:33 AM	#13
spyderco10 Colonel 63 Rep 2,427 Posts Drives: AW E92 M3 6MT Join Date: Jul 2008 Location: Honolulu, HI iTrader: (0)	just fill the rest up with race fuel 110 octane, and you'll be fine __________________ “For God so loved the world that he gave his one and only Son, that whoever believes in him shall not perish but have eternal life.” - John 3:16
	Appreciate 0 Quote

01-11-2010, 03:03 AM	#16
rsmamg Flying First Class 30 Rep 582 Posts Drives: M Join Date: Sep 2008 Location: CA iTrader: (0)	wont do anything noticeable, imo
	Appreciate 0 Quote

01-11-2010, 12:01 PM	#18
PunjabiM3 Colonel 253 Rep 2,091 Posts Drives: M5 CS Join Date: Mar 2008 Location: Flower Mound, TX iTrader: (1)	lol. If it were my car I would fill the rest up with premium to offset the 87 (as others have mentioned already). __________________ 2012 Audi R8 V10TT\| 6MT\| Suzuka Grey 2015 Ferrari 458 Speciale\| Rosso Scuderia 2020 BMW X7\| Mineral White 2024 718 GT4 RS \| Arctic Grey
	Appreciate 0 Quote

01-13-2010, 02:37 AM	#19
BPMSport BimmerPost Supporting Vendor 3387 Rep 7,541 Posts Drives: Harrop M3 / F10 M5 / F82 M4 Join Date: Apr 2008 Location: SoCal iTrader: (9) Garage List 2000 BMW M5 [0.00] 1990 BMW 735i Turbo [0.00] 2008 BMW M3 [7.50] 2015 BMW M3 [0.00] 2015 BMW M5 [0.00]	If you wanted to, you could fill the entire tank of the M3 with 87 octane gas. The engine would not fall apart. The ECU has 87 octane fallback programming, not to mention a state of the art knock detection system. It will only cause a loss in performance. Fill it up with 91 to bring the total level up, and you'll be fine. We had a customer complain about our tune only to find out that he was filling up with 87 octane gas on the regular... He was surely surprised driving it with 91 . __________________ -----\| Like us on Facebook \| Instagram \|\| Tuning Information \| Remote Coding \|----- ----Visit us at www.BPMSport.com - Emotion. Driven. \| Toll Free: (888) 557-5133----
	Appreciate 0 Quote