MINI2

Boondox · Apr 4th, 2005, 04:08 PM

Okay, I know the MC calls for 91 octane, but I've heard from several owners who use 89 or even 87 octane with no noticable effects? One says it feels sluggish with 87, but there's no knocking, etc. And on my test drive, not knowing any better at the time, I put 5 gallons of 87 in the car and it was plenty fast!

So what's the harm of splitting the diff and using 89 octane fuel?

Pete

dansmini · Apr 4th, 2005, 06:44 PM

Lately I have been switching back and forth between 89 and 93. 91 just can't be found around here! I can't tell the difference between 89 and 93. Mileage doesn't change, performance doesn't seem to change. I thin kwith gas prices being what they are, I am inclined to just run 89 in it.

quicksprint · Apr 4th, 2005, 08:45 PM

I only use Shell Optimax (98.2 RON approx

) in my 'S'....even if it means going out of my way when it needs filling up...........any excuse for a drive

.

RedUn · Apr 4th, 2005, 10:27 PM

Optimax everytime

cars been ran on 98 for 30 odd k miles apart from the odd tank where I'v had to use normal stuff

PM_ · Apr 4th, 2005, 11:13 PM

BP Ulimate @ 98RON +

enzothemaddog · Apr 6th, 2005, 12:43 AM

ELF 102 Octane & Programming

Sands · Apr 6th, 2005, 01:35 AM

Quote: Originally Posted by dansmini

Lately I have been switching back and forth between 89 and 93. 91 just can't be found around here! I can't tell the difference between 89 and 93. Mileage doesn't change, performance doesn't seem to change. I thin kwith gas prices being what they are, I am inclined to just run 89 in it.

You may notice the difference if you track the car and get a good heat soak. The ECU should retard the timing until it doesn't knock, but you won't get complete combustion if that happens too much.

I've head of people using 87 on Subaru wrxs and STIs until the motor burns itself up. Not a happy ending.

IMHO, better off paying the extra dollar or three for a tank of the better stuff.

Apr 4th, 2005, 04:08 PM	#1
Boondox MINI2 Regular Join Date: Apr 2005 Location: Northern Vermont Local Time: 05:55 AM Posts: 249 Offline	What octane rating do you use? Okay, I know the MC calls for 91 octane, but I've heard from several owners who use 89 or even 87 octane with no noticable effects? One says it feels sluggish with 87, but there's no knocking, etc. And on my test drive, not knowing any better at the time, I put 5 gallons of 87 in the car and it was plenty fast! So what's the harm of splitting the diff and using 89 octane fuel? Pete

Apr 6th, 2005, 12:43 AM	#6 (permalink)
enzothemaddog Un-Banned Join Date: Jun 2003 Location: Train Station Toilet Local Time: 07:55 PM Posts: 1,772 Offline	ELF 102 Octane & Programming Last edited by Humourl3ss : Apr 6th, 2005 at 09:54 AM.

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Apr 4th, 2005, 06:44 PM	#2 (permalink)
dansmini Sullivan Racing Join Date: Sep 2003 Location: Ohio Local Time: 05:55 AM Posts: 1,121 Offline	Lately I have been switching back and forth between 89 and 93. 91 just can't be found around here! I can't tell the difference between 89 and 93. Mileage doesn't change, performance doesn't seem to change. I thin kwith gas prices being what they are, I am inclined to just run 89 in it.

Apr 4th, 2005, 08:45 PM	#3 (permalink)
quicksprint MINI2 Newbie Join Date: Jan 2005 Location: UK,and Florida soon Local Time: 09:55 AM Posts: 42 Offline	I only use Shell Optimax (98.2 RON approx ) in my 'S'....even if it means going out of my way when it needs filling up...........any excuse for a drive .

Apr 4th, 2005, 10:27 PM	#4 (permalink)
RedUn MUGEN POWER Join Date: Mar 2003 Location: s2ki.com Local Time: 10:55 AM Posts: 11,395 Offline	Optimax everytime cars been ran on 98 for 30 odd k miles apart from the odd tank where I'v had to use normal stuff

Apr 4th, 2005, 11:13 PM	#5 (permalink)
PM_ MINI2 Regular Join Date: Jul 2004 Local Time: 08:55 PM Posts: 96 Offline	BP Ulimate @ 98RON +

Apr 6th, 2005, 01:35 AM	#7 (permalink)
Sands MINI2 Regular Join Date: Mar 2005 Location: Des Moines, IA Local Time: 04:55 AM Posts: 112 Offline	Quote: Originally Posted by dansmini Lately I have been switching back and forth between 89 and 93. 91 just can't be found around here! I can't tell the difference between 89 and 93. Mileage doesn't change, performance doesn't seem to change. I thin kwith gas prices being what they are, I am inclined to just run 89 in it. You may notice the difference if you track the car and get a good heat soak. The ECU should retard the timing until it doesn't knock, but you won't get complete combustion if that happens too much. I've head of people using 87 on Subaru wrxs and STIs until the motor burns itself up. Not a happy ending. IMHO, better off paying the extra dollar or three for a tank of the better stuff.

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