which octane gas do you put?

[Lewd Ferrigno]

There is ZERO benefit to running race gas on the street. It's just more expensive. Chances are, your bike will make less power with it in the tank.

[porky786]

Originally Posted by Lewd Ferrigno

There is ZERO benefit to running race gas on the street. It's just more expensive. Chances are, your bike will make less power with it in the tank.

I run small doses (cup pertank), not for power but for the engine cleanliness it provides and upper cylinder lube , lead oxides devour carbon, gorgeous sparkplugs, valves stems, piston crowns ect and its seen in the exhaust even at those small doses. Decarbons every thing.

been doing it for several hundred thousands of miles on mc motors. I was alittle hesitant to use on a catted bike(till I was more concerned of not using) with pair valve carboning potential, but the vfr has over 61,000 mile on it without cat issue, 02 sens or anything else.

Pretty dang flawless, would actually be the word , and divides out to about 25 cent per cup


nothing on the shelf does what real Leaded race fuel does

[PAFizzer]

leaded race gas: foul spark plugs? I thought it did.

[MattR302]

My Ninja500 calls for at least 87, it gets 87. My ZX6R (same bike as you, OP), calls for at least 90, it gets 93 or 91. Most gas stations around here are 87/89/93. A few are 87/89/91/93.

[OldSchlPunk]

Leaded race gas is going away. More and more, race organizations are getting pressure from the EPA to go to unleaded fuels. The AMA has been using no-lead for at least 2 years now.

Oh, and that nozzle would have to be pretty damned big to not fit in a bike tank.

[Lewd Ferrigno]

Originally Posted by porky786

I run small doses (cup pertank), not for power but for the engine cleanliness it provides and upper cylinder lube , lead oxides devour carbon, gorgeous sparkplugs, valves stems, piston crowns ect and its seen in the exhaust even at those small doses. Decarbons every thing.

been doing it for several hundred thousands of miles on mc motors. I was alittle hesitant to use on a catted bike(till I was more concerned of not using) with pair valve carboning potential, but the vfr has over 61,000 mile on it without cat issue, 02 sens or anything else.

Pretty dang flawless, would actually be the word , and divides out to about 25 cent per cup


nothing on the shelf does what real Leaded race fuel does

Actually, there is NO benefit to running race gas on a street bike. You could save money and get a motorcycle specific fuel additive to do the same.

You have to tune for race gas to see any benefit.

Also, my motors never look fucked up inside on regular fuel.

[HiSpeed48]

Originally Posted by DaleCaliente

Shell 93. why cheap out. I would never ever use less than 91 on a Supersport.

owners manual calls for 87. maybe its because of the carbs.. idk



on another note, higher octane gas burns slower. your ignition timing is optimized for pump gas. so you could cause damage with a much higher octane. but thats just an assumption.

[OldSchlPunk]

Originally Posted by HiSpeed48

on another note, higher octane gas burns slower. your ignition timing is optimized for pump gas. so you could cause damage with a much higher octane. but thats just an assumption.

Higher octane will NOT cause damage, it just won't give you a performance advantage.

[OldSchlPunk]

Originally Posted by Lewd Ferrigno

Actually, there is NO benefit to running race gas on a street bike. You could save money and get a motorcycle specific fuel additive to do the same.

You have to tune for race gas to see any benefit.

Also, my motors never look fucked up inside on regular fuel.

I agree. Modern FI systems run fairly lean through the entire spectrum. As such, there will be little unburnt fuel to contaminate your plugs, valves, etc. How would car manufacturers be able to push plug changes back to 100k miles if the engine wasn't running clean?

[OldSchlPunk]

Originally Posted by HiSpeed48

owners manual calls for 87. maybe its because of the carbs.. idk

Carbs have absolutely nothing to do with octane requirements.

[OldSchlPunk]

Originally Posted by DaleCaliente

Shell 93. why cheap out. I would never ever use less than 91 on a Supersport

If i was a really smart mechanic, and had proof/reasons to go lower, I would, but I am not.

85 octane. good luck with that...minimums are on bikes for a reason.

It's your money, go ahead and waste it.

In the meantime, read up on fuel. There has been at least 1 thread besides this on fuel and octane requirements. Here's one with some very good info: Racing Gas in stock zx6r

[Tripped1]

Originally Posted by OldSchlPunk

I agree. Modern FI systems run fairly lean through the entire spectrum. As such, there will be little unburnt fuel to contaminate your plugs, valves, etc. How would car manufacturers be able to push plug changes back to 100k miles if the engine wasn't running clean?

Cooler plugs with longer gaps as well.

[porky786]

No on the shelf snake oil does what leaded race fuel will do

Thx, but Ill stick with KNOWN results , your not the first to doubt, its cool!

But I wouldnt waste my time and money with it, if I didnt see the results, and thats the simple truth , it too much trouble otherwise.


I once had a bike that had carbon buildup up in the exhaust a screen required to be cleaned every 11k , ran half a tank of leaded race fuel, under the lead oxide powder was shiny clean metal. That screen completely decarboned

Which on the shelf snake oil will do that?

[porky786]

Originally Posted by Tripped1

Cooler plugs with longer gaps as well.

The porcelin on modern bikes run very lean or whitesh, they will still get growing carbon down deep in the plugs, even with the lean setups. may not really be an issue, but gorgeous and Hedius are the difference.

Lead will turn those porcelins Golden tan and deep clean all carbon , if they are jetted right.

[FatHawk]

I throw in half a cup of kerosene, helps the carbon and give more horsepower.







And don't forget half a cup of: