Regular Unleaded vs Premium Unleaded? - Page 10 - Yamaha FZ6R Forums - International FZ6R / XJ6 Motorcycle Community Forum

whatever · 08-09-2010, 05:46 AM

i use to run all the better gas in the ninja 250.. 91 93 etc. then i read some where you should run what the bike calls for... started running 87 in the ninja and the bike seem liked it ran better.

so been running 87 what the manual calls for..... fz6r

ry-mac75 · 08-09-2010, 10:13 AM

I used Sunoco Ultra 94 all the time. It costs bugger all to fill the thing - why not use the highest octane available?

Superfly · 08-09-2010, 10:36 AM

I broke down about a month ago and tried Shell 91 Vpower. Waited till the tank was almost dry and filled up. I really really really wanted the bike to run better. It didnt. I could tell no difference at all. The engine runs hard with either 87 or 91.

The reason I tried 91 is because I read that Shell gas might actually have some special formula in their premium fuel that may increase horsepower. Increase is a word that could mean anything above 0.

Truthfully if it did increase power I couldnt tell. I'm back to regular Shell 87.

rr_double_rr · 08-19-2010, 12:24 PM

I'm just jumping into the fray here, I know, and I intend to run Mid grade in mine to mitigate the benfits/ drawbacks of both, but it was my understanding that octane refers to the molecular structure of hydrocarbons in general. The carbon atoms tend to group in clusters of 8, hence OCT as a root, and the 87/91/93 ratios are just their occurance in a predetermined quantity of fuel.

wykon · 08-20-2010, 10:10 PM

Please correct me if I am wrong, it has been a few years in discussing this...

From what I recall the higher octane is needed for higher compression engines, since it is less prone to detonation. Detonation is when the mixture ignites without the spark. When does detonation occur, in regards to the engine cycle and how does this effect power/mpg?

whatever · 09-01-2010, 05:49 AM

ran some 93 high test yesterday, did not see any real differents going back to reg fuel .

**dart1963** · 09-01-2010, 07:30 AM

Quote:

Originally Posted by wykon

Please correct me if I am wrong, it has been a few years in discussing this...

From what I recall the higher octane is needed for higher compression engines, since it is less prone to detonation. Detonation is when the mixture ignites without the spark. When does detonation occur, in regards to the engine cycle and how does this effect power/mpg?

What happens is the fuel/air ignites because of the pressure and heat, compression cycle, usually in odd ways instead of evenly out from the plug.

plenty of info out there if you want more details: Engine knocking - Wikipedia, the free encyclopedia

toddjcruz · 09-01-2010, 09:32 AM

Quote:

Originally Posted by joloy133

Let's just say some have a more sensitive "arse"......Next!

Hey, my bike feels faster just by washing it. It's amazing how a clean bike can make you feel. LOL.

whatever · 09-03-2010, 06:20 PM

tried some sunoco 93/94 premium and the bike runs a little better.... so now i will start running 91 or higher.

i could feel the differents. idle better and the thottle response was improved... felt that way to me.

jcbrown630 · 09-03-2010, 06:41 PM

Premium = ZERO ethanol.

/thread

08-09-2010, 10:36 AM	#93 (permalink)
Superfly Senior Member Bike: Yellow 2009 FZ6R, 2006 Ducati 999 Join Date: Feb 2010 Location: Toronto Canada Posts: 257 Thanks: 36 Thanked 46 Times in 35 Posts	I broke down about a month ago and tried Shell 91 Vpower. Waited till the tank was almost dry and filled up. I really really really wanted the bike to run better. It didnt. I could tell no difference at all. The engine runs hard with either 87 or 91. The reason I tried 91 is because I read that Shell gas might actually have some special formula in their premium fuel that may increase horsepower. Increase is a word that could mean anything above 0. Truthfully if it did increase power I couldnt tell. I'm back to regular Shell 87. Last edited by Superfly; 08-09-2010 at 10:39 AM.

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08-09-2010, 05:46 AM	#91 (permalink)
whatever Senior Member Bike: 09 white fz6r Join Date: Jul 2010 Location: ny Posts: 272 Thanks: 5 Thanked 19 Times in 18 Posts	i use to run all the better gas in the ninja 250.. 91 93 etc. then i read some where you should run what the bike calls for... started running 87 in the ninja and the bike seem liked it ran better. so been running 87 what the manual calls for..... fz6r

08-09-2010, 10:13 AM	#92 (permalink)
ry-mac75 Senior Member Bike: 2009 Raven FZ6R Join Date: Apr 2010 Location: Toronto, ON Posts: 253 Thanks: 10 Thanked 76 Times in 38 Posts	I used Sunoco Ultra 94 all the time. It costs bugger all to fill the thing - why not use the highest octane available?

08-19-2010, 12:24 PM	#94 (permalink)
rr_double_rr Senior Member Bike: 2009 FZ6-R Raven Join Date: Aug 2010 Location: Lawrenceville, GA Posts: 154 Thanks: 0 Thanked 27 Times in 22 Posts	I'm just jumping into the fray here, I know, and I intend to run Mid grade in mine to mitigate the benfits/ drawbacks of both, but it was my understanding that octane refers to the molecular structure of hydrocarbons in general. The carbon atoms tend to group in clusters of 8, hence OCT as a root, and the 87/91/93 ratios are just their occurance in a predetermined quantity of fuel.

08-20-2010, 10:10 PM	#95 (permalink)
wykon Junior Member Bike: 2009 FZ6R Join Date: Aug 2010 Location: MI Posts: 15 Thanks: 3 Thanked 0 Times in 0 Posts	Please correct me if I am wrong, it has been a few years in discussing this... From what I recall the higher octane is needed for higher compression engines, since it is less prone to detonation. Detonation is when the mixture ignites without the spark. When does detonation occur, in regards to the engine cycle and how does this effect power/mpg?

09-01-2010, 05:49 AM	#96 (permalink)
whatever Senior Member Bike: 09 white fz6r Join Date: Jul 2010 Location: ny Posts: 272 Thanks: 5 Thanked 19 Times in 18 Posts	ran some 93 high test yesterday, did not see any real differents going back to reg fuel .

09-03-2010, 06:20 PM	#99 (permalink)
whatever Senior Member Bike: 09 white fz6r Join Date: Jul 2010 Location: ny Posts: 272 Thanks: 5 Thanked 19 Times in 18 Posts	tried some sunoco 93/94 premium and the bike runs a little better.... so now i will start running 91 or higher. i could feel the differents. idle better and the thottle response was improved... felt that way to me.

09-03-2010, 06:41 PM	#100 (permalink)
jcbrown630 Senior Member Bike: 2009 FZ6R Raven Join Date: Aug 2010 Location: Matthews, NC Posts: 101 Thanks: 4 Thanked 15 Times in 13 Posts	Premium = ZERO ethanol. /thread

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