What BRAND of fuel are you using?

[RossLH]

were not talking about water in fuel, were talking about fuel. of course dumping water sand or pie into a fuel will make it poor quality. was the quoted bit changed ?

You misquoted me. I said "low quality 93 octane causes detonation". You quoted "low quality octane causes deton". I always buy 93 octane. Always. If I buy a lower quality fuel (still 93 octane), it will cause detonation. High quality 93 octane and low quality 93 octane have the same resistance to combustion, but higher quality 93 octane will combust more completely.

[ohgood]

were not talking about water in fuel, were talking about fuel. of course dumping water sand or pie into a fuel will make it poor quality. was the quoted bit changed ?

You misquoted me. I said "low quality 93 octane causes detonation". You quoted "low quality octane causes deton". I always buy 93 octane. Always. If I buy a lower quality fuel (still 93 octane), it will cause detonation. High quality 93 octane and low quality 93 octane have the same resistance to combustion, but higher quality 93 octane will combust more completely.

isn't that the point of an octane rating ?

[RossLH]

Fuel quality is not part of the octane rating. Fuel quality and fuel octane are two distinct and different concepts. Octane is a rating of resistance to combustion, or in other words activation energy. Quality is a measure of how completely the fuel burns, which could also be called purity. Impurities in fuel do not necessarily change the activation energy of the fuel, but they will change how much of the fuel burns.

[mjslive2fly]

I drive an '09 Subaru WRX and haven't noticed any difference between brands.

[RossLH]

You won't notice a difference on a stock or OTS tune. I did my own tuning, and pushed the car to the limits of AFR, boost, and timing. Your car is not at all an acceptable representation of mine. (Not to mention 32-bit ECU vs. 16-bit, 2.5L vs. 2.0L, VF52 vs. TD04-13T, so on and so forth.)

[codajastal]

And my Wang's bigger than yours

Sent from my HTC One X using Tapatalk 2

[Janx101]

Is that the soft oily click of an engineers slide rule I hear? 

[RossLH]

And my Wang's bigger than yours

Sent from my HTC One X using Tapatalk 2

For what it's worth, my car on the stock turbo pushed to the limits struggles to make the same power his does from the factory.

[ohgood]

Fuel quality is not part of the octane rating. Fuel quality and fuel octane are two distinct and different concepts. Octane is a rating of resistance to combustion, or in other words activation energy. Quality is a measure of how completely the fuel burns, which could also be called purity. Impurities in fuel do not necessarily change the activation energy of the fuel, but they will change how much of the fuel burns.

that all sounds nice. where do you find thisi high quality fuel ? refining it yourself ?

I'm sorry man, this is laughable stuff now.

[RossLH]

I'm sorry man, this is laughable stuff now.

Ah, the classic "I can't admit I'm wrong, so I'll attempt to make fun of him instead."

[slipperymongoose]

Come on guys this isn't a scientific thread this is about how much your in tune with your machine and the little differences you notice and if alot of ppls little differences are the same we may see some sort of trend.

[RossLH]

On topic, I put Wawa gas in my bike, and that proved to be a mistake. Went on a group ride a couple days ago, and the two of us who filled up at that station had problems with our bikes running badly. I had to open the choke to make it run rich just so it'd get up to highway speed.

[Old Mechanic]

I run the cheapest regular gas I can find, usually Wal Mart. In my 2011 Fiesta I've averaged 45.58 MPG for the last 15,000 miles (6 spped at). In my 97 Ranger (5 speed manual 4 cylinder) I've averaged just under 32 MPG for the last 5000 miles since I bought the truck used with 124k. The GS500E has averaged just under 62 MPG (all US gals) for the last 650 miles since I bought it. It's still lean under light loads but I'll probably take it off the road long enough to go through the carbs when I get the 89 roadworthy.

Pretty sure all the gas here on the east coast comes through pipelines regardless of the retailer. I can get E0 but it's a 60 mile drive and another 40 cents a gallon, simply not worth it. Sure if you let E10 sit in an open container it will absorb humidity, but you don't have to worry about water in your gas if you just avoid letting it sit for a long time. I can tell by the smell when it is old, and I just drain the bike and toss it in the truck or car. I generally ride through winter here unless it gets cold enough for black ice. I have no problem with E10 in a 42 year old bike, at least nothing I can detect in over 2 years and 1300 miles. I have seen E10 sit in cars for close to a year without issues with modern evaporative emissions systems which prevent air from entering the fuel tank.

Alcohol has a very high octane rating. My buddy used to race go carts with B&S engines that dynoed 18 HP (normally 5). They had girdles over the cyl heads to keep them from blowing off the motor and ran pure alcohol. At the end of a race he could put his hand on the cylinder head but not the exhaust. The alcohol fuel cooled the head that much. Old tech flat head with splash feed oiling system.

regards
Mech

[ohgood]

I'm sorry man, this is laughable stuff now.

Ah, the classic "I can't admit I'm wrong, so I'll attempt to make fun of him instead."

I wasn't making fun of you. I asked where you get the higher quality gas ?

also, how am I wrong ?

[ohgood]

Come on guys this isn't a scientific thread this is about how much your in tune with your machine and the little differences you notice and if alot of ppls little differences are the same we may see some sort of trend.

soooo, let's make it scientific. if anyone here can tell the difference between 87 octane and 97 in their gs ( most of us have/had one), by all means post up the double blind studies results.

since it won't happen, ill go ahead and call bullshit right now.

[RossLH]

I asked where you get the higher quality gas ?

In the past few years I've moved around a lot, and each new city I move to I usually have to try a couple gas stations before I find a reliable one. It's trial and error.

Although I will retract my previous statement when I said I don't care what goes into my GS. I found one gas station it surely did not like, I won't be filling up there again.

also, how am I wrong ?

"93 octane is 93 octane, unless it's different methods of determining the octane, or different levels of ethanol."

That comment right there. All 93 octane is not the same. High quality 93 octane is not the same as low quality 93 octane. That's the entire point of my argument.

[slipperymongoose]

Come on guys this isn't a scientific thread this is about how much your in tune with your machine and the little differences you notice and if alot of ppls little differences are the same we may see some sort of trend.

soooo, let's make it scientific. if anyone here can tell the difference between 87 octane and 97 in their gs ( most of us have/had one), by all means post up the double blind studies results.

since it won't happen, ill go ahead and call bullshit right now.

Because I have seen all the armchair scientists in all the other fuel threads so no lets not make it scientific. Science has been flogged like a dead horse on this forum.

[twocool]

I've been calling for "mythbuster" type double blind tests on this and other forums.........

For fuel, oil, additives, batteries, tires, spark plugs, etc, etc.........

Everybody is interested in the bullshitting....but nobody is interested in the scientific test......

sad...

Cookie

Come on guys this isn't a scientific thread this is about how much your in tune with your machine and the little differences you notice and if alot of ppls little differences are the same we may see some sort of trend.

soooo, let's make it scientific. if anyone here can tell the difference between 87 octane and 97 in their gs ( most of us have/had one), by all means post up the double blind studies results.

since it won't happen, ill go ahead and call bullshit right now.

[slipperymongoose]

Well then instead of pointing the finger turn that finger around and do the double blind yourself and document the results.

[Janx101]

There is that point!  ... Can't demand .. Or even ask for stuff and not give it a go? ..

Not even being convinced that everything is bullshit .... Reverse holds true also... Double blind to prove the bullshit?