661 Oil Test 32:1 vs 40:1 vs 50:1 ?

[redbull660]

Gotta see what I have left for chain. The Amish farm I'm cutting at, he's busy..the local Amish community is building a barn for the next 4 days....maybe they don't want to listen to my saw? lol So this friday or saturday. Might be able to find some goonies some place else, but I doubt it, this early in the season.

 

[Haywire Haywood]

I was happy to see this sign up the road in Lexington last week.... I asked how often they empty the tank and they said it was a popular pump and they were the only no-ethanol retailer in town.

 

[Hedgerow]

Well....25" is medium size at best and far from big. Are you really gonna questioning me about cutting big wood? Are you saying cookie cutters and firewood hacks cut bigger wood more often?[emoji23]

Pfffttt...

Big is relative...

Sup Chris..?

 

[Haywire Haywood]

You shouldn't be showing your big wood to your relatives unless they are in the medical field.... It's just not right.

 

[Mastermind]

Oh my.

 

[Husqavarna Guy]

I doubt it. I use nothing but premium.

I thought once you add in the oil it reduces the octane rating?

 

[Mastermind]

I thought once you add in the oil it reduces the octane rating?

I think it raises octane......

 

[bwalker]

I think it raises octane......

Most oils don't have any effect on octane. Besides most of the oil drops out of suspension as soon as the fuel air mixture enters the crankcase. So in reality what oil is in the combustion chamber is coating the piston, head, cylinder walls, etc and not part of the charge being ignited.

 

[Andyshine77]

Most oils don't have any effect on octane. Besides most of the oil drops out of suspension as soon as the fuel air mixture enters the crankcase. So in reality what oil is in the combustion chamber is coating the piston, head, cylinder walls, etc and not part of the charge being ignited.

Then why does H1R effect combustion?

 

[bwalker]

This is speculating, but I believe its because it has alot of diluent in its blend. The diluent is evaporated like the incoming fuel and makes its way to the combustion chamber.
Diluent is Stoddard solvent in many cases.

 

[Mastermind]

Oil is a very interesting topic for me.......

Does that make me an oil geek?

 

[NWCoaster]

Oil definately lowers octane.... quite severely actually. The more oil, the lower the end result. Should always start with higher octane to pervent detonation, which we all know is very detrimental to pistons/bearings.

 

[bikemike]

Octane booster With some oil and a splash of gas?

 

[bwalker]

Oil definately lowers octane.... quite severely actually. The more oil, the lower the end result. Should always start with higher octane to pervent detonation, which we all know is very detrimental to pistons/bearings.

Blanket statement and in practice mostly not true.

 

[Mastermind]

Oil definately lowers octane.... quite severely actually. The more oil, the lower the end result. Should always start with higher octane to pervent detonation, which we all know is very detrimental to pistons/bearings.

No where in my searching over the years have I found any proof of this. Quite the opposite actually.

 

[NWCoaster]

Octane booster With some oil and a splash of gas?

Toluene is one of the most effective octane boosters there is and is readily available. 10% by volume in gasoline produces an octane rise of 2 full numbers. ( Most octane boost products quote points of octane rise, there are ten points in one full octane number)

 

[bwalker]

Give you an example. I Currently have a 09 yZ-250 that's very sensitive to detonation. I run the bike at 32:1 and premium non ethanol pump fuel. However, if I make a weekend trip to the dunes I will run it at 20:1 with only minor changes to the low speed jetting. It doesn't detonate a bit. Now, if I were to lean the main jet out two sizes or the weather got the 30's it will detonate at either ratio.
This is with Yamalube 2R btw.

 

[bwalker]

Toluene is one of the most effective octane boosters there is and is readily available. 10% by volume in gasoline produces an octane rise of 2 full numbers. ( Most octane boost products quote points of octane rise, there are ten points in one full octane number)

Toluene will indeed boost octane, but it's also hell on rubber parts and can make starting difficult in cold weather when used at high concentrations.

 

[NWCoaster]

No where in my searching over the years have I found any proof of this. Quite the opposite actually.

So you didn't ACTUALLY read the articles that you posted links to earlier?????
Quote from the second article you know everything about:
One of the things you should do, is run high octane gas with any two-stroke mix. When all of the two strokes (the old days) were developed, they all used Castrol petroleum oil at a 20:1 ratio and found that 92 octane gas had the octane reduced to 72 with presence of that much oil. Modern oils won’t affect the fuel quite as much, but if you started with 86 or 87 octane regular fuel, you can see where you’ll end with a very low octane mix. You could end up with a “pinging” bike.

 

[bikemike]

Yeah not a big fan of octane booster. But i have had great results running plane fuel in my old race bikes it burns clean unlike 110 octane race fuel. They have some additives but that is also for moisture reasons.