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Old 12-06-2011, 11:01 AM   #41
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Is Shell Rotella good for motorcycles?
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Old 12-06-2011, 11:10 AM   #42
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Quote:
Originally Posted by Helios View Post
Plus the other 40 feet of hose below the ground.
You just paid for the next guy's full tank of 93 super octane., bro.
fuel is mixed at the pump.. So no, that's not true. Find an old gas station with pumps that still have counters on them, there are two counters, one for premium, one for regular. For plus it mixes one part premium to every two parts regular. and as someone else mentioned, new pumps don't leave much fuel in the hose.
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Old 12-06-2011, 11:16 AM   #43
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no wonder why I feel my bike kinda slacking after filling up at some ***** gas stations, I hadn't tought about it, since I ride in a daily basis, I just will drop an octane booster next fill up and watch where I get my fuel from, and like "bevo" said, the price of the galon of the last purchase... which should match either regular or premium
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Old 12-06-2011, 11:31 AM   #44
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Quote:
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So basically what everyone is saying is dont be the first to fill up on a group ride? Got it!
but u r still doomed if the bike before you pump 87..lol like mine.

The PC III map I am using in my bike is dyno-tuned with 87.
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Old 12-06-2011, 11:32 AM   #45
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Is Shell Rotella good for motorcycles?
here we go~
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Old 12-06-2011, 11:37 AM   #46
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i use 87 in my mini cooper s (supercharge) and havent had any issues... just trouble sitting down bc of all the cold hard cash in my wallet
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Old 12-06-2011, 11:40 AM   #47
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....How about driving to the gas station and watching for someone to fillup with super...then run to the pump and fill gas cans..
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Old 12-06-2011, 12:17 PM   #48
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now it's time for blind fold test. I always want to do this.
Have someone ride up to the gas station with u, tell them to push button for whatever grade of the gas w/o u knowing it. Then ride til dry. Take the same person, push another grade of the gas (could be the same as last time) U ride again.
Then we see if u can tell the difference on that bike or car or jet. lol

That way is the more fair to justify if it's psychological or actual.
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Old 12-06-2011, 12:26 PM   #49
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Personally for me. My bike runs like on a lower grade fuel. Maybe because it's older or for whatever reason.
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Old 12-06-2011, 12:26 PM   #50
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Quote:
Originally Posted by jptshadow View Post
now it's time for blind fold test. I always want to do this.
Have someone ride up to the gas station with u, tell them to push button for whatever grade of the gas w/o u knowing it. Then ride til dry. Take the same person, push another grade of the gas (could be the same as last time) U ride again.
Then we see if u can tell the difference on that bike or car or jet. lol

That way is the more fair to justify if it's psychological or actual.
no. Psychological? Your education failed you.

As for the wall street estimate of fuel left in line I did a quick calc:

1) fuel is selected inside the pump you put your card in
2) conservative estimate of 12 feet of line (144 inches)
3) conservative estimate of 1" diameter ID on line

This gives 113 cubic inches or .489 gallons. I at first thought the 1/3 gallon in line was bogus, but now I'm not so sure.

Octane is well documented, over discussed, and still misunderstood (see above quote for reference).

All you need to know is: don't bump up the octane if your vehicle is designed for lower, don't use lower on effective high compression engines. With this topic I would now have to add wait to fill up on premium till you are almost out or use a gas can to pull off half a gallon then put that in your truck/car and fill up the bike with the rest.

Back to more beating of this dead horse.
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Old 12-06-2011, 12:30 PM   #51
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Quote:
Originally Posted by jptshadow View Post
now it's time for blind fold test. I always want to do this.
Have someone ride up to the gas station with u, tell them to push button for whatever grade of the gas w/o u knowing it. Then ride til dry. Take the same person, push another grade of the gas (could be the same as last time) U ride again.
Then we see if u can tell the difference on that bike or car or jet. lol

That way is the more fair to justify if it's psychological or actual.
The engine knocking would be sort of a clue
Quote:
Octane rating or octane number is a standard measure of the anti-knock properties
...period
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Last edited by Bevo; 12-06-2011 at 12:34 PM.
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Old 12-06-2011, 12:35 PM   #52
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Quote:
Originally Posted by Bevo View Post
The engine knocking would be sort of a clue...period
right
but some might engines might not have that even with the 87, yea?
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Old 12-06-2011, 01:32 PM   #53
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You people are cheap...$.30 difference, 3 or so gallons....$1 extra?
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Old 12-06-2011, 01:41 PM   #54
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Quote:
Originally Posted by jptshadow View Post
right
but some might engines might not have that even with the 87, yea?
Yes, some engines are designed to run on 87 octane and using higher octane in those engines doesn't do
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Old 12-06-2011, 01:42 PM   #55
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Quote:
Originally Posted by Senator View Post
My direct port injection Lexus begs to differ.
Over 11:1 C/R factory.
My 07 gsxr1000 has custom made 14:1 CP pistons and still dynoed highest on lower octane fuel
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Old 12-06-2011, 01:46 PM   #56
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Quote:
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My 07 gsxr1000 has custom made 14:1 CP pistons and still dynoed highest on lower octane fuel
Don't you come in here talking facts and knowing your . People want to pay for their octane.
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Old 12-06-2011, 01:46 PM   #57
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Quote:
Originally Posted by Bevo View Post
Yes, some engines are designed to run on 87 octane and using higher octane in those engines doesn't do


Quote:
Originally Posted by Vegas Kid View Post
You people are cheap...$.30 difference, 3 or so gallons....$1 extra?
good point
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Old 12-06-2011, 02:23 PM   #58
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One of our most intelligent members wrote this some time ago.
If you have any questions about what octane is or what you should use, please read this thread before you embarrass yourself.
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Old 12-06-2011, 02:26 PM   #59
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Quote:
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My 07 gsxr1000 has custom made 14:1 CP pistons and still dynoed highest on lower octane fuel


Track or street, custom smoothed or standard manufacturing surface finish, hot or cold engine, high RPM/high load or Low RPM/high load, damage or non-damaged, low mean time to failure or reliability, I could go on.

What you have posted is useless to the typical conversation. Lower octane will provide more energy to the combustion process. High octane only has additives to the detonation. There is nothing "better" about higher octane and getting higher dyno readings does not mean that you should use it on a street bike.
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Old 12-06-2011, 02:55 PM   #60
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Quote:
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My 07 gsxr1000 has custom made 14:1 CP pistons and still dynoed highest on lower octane fuel
Interesting for sure.
I was simply speaking to GJ's statement that higher octane is only for forced induction applications.
PS- My Lexus service manual says it requires 91 octane. It does not say suggest, or recommend.
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