Fuel color before mixing

[Duane(Pa)]

I use E free 90 to mix. One station has fuel as clear as Gin or pure water. The other (top tier) is the color of P!ss. I think I’m liking the clear stuff better, but could be very wrong. It’s very noticeable and both stations have enough volume to eliminate any stale fuel scenario. What y’all think?

 

[huskihl]

I’ve seen it here as well. Last year their E free was yellow and the last couple times I bought it it was clear

 

[K Mueller]

Is it consistent or colors change all the time? Maybe different refineries or additives.

 

[dangerousatom]

I think the yellow is detergent additives and stabilizers, they will put in dye to emphasize this as well . Straight distilled gasoline with nothing in it is near clear from what I remember.

bwalker: needs to comment on this​

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[bwalker]

I think the yellow is detergent additives and stabilizers, they will put in dye to emphasize this as well . Straight distilled gasoline with nothing in it is near clear from what I remember.

bwalker: needs to comment on this​

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It should be clear.
Yellow could mean several things. It could be oxidized or it could have some diesel blended into it(pretty common).

 

[SawAddictedFarmer]

It should be clear.
Yellow could mean several things. It could be oxidized or it could have some diesel blended into it(pretty common).

Intentionally? Any downside to running it or is it too little to matter?

 

[pbillyi69]

the efree here is clear sometimes and tinted other time from the same station but that is the 92 octane. the 87 efree is clear everytime and they will only pump the 87 into cans they will not pump it into a vehicle

 

[Duane(Pa)]

FWIW to people in my region, Kwik-Fill (united refining) is clear. Rutter's EF90 (top tier) is pale yellow/amber.

 

[bwalker]

Intentionally? Any downside to running it or is it too little to matter?

Intentionally. The downside is it burns slightly dirtier. Still meets the same specs. My brother works for Phillips 66 in their quality lab. The facility he works at does this all the time.

 

[bwalker]

the efree here is clear sometimes and tinted other time from the same station but that is the 92 octane. the 87 efree is clear everytime and they will only pump the 87 into cans they will not pump it into a vehicle

Astute observation. Gasoline isnt made to a recipe. Its a soup of different crap that changes by the hour. The art of refining is making money off every drop of oil you refine. In other words you blend the good with the bad in order to meet min specs.

 

[Duane(Pa)]

Intentionally. The downside is it burns slightly dirtier. Still meets the same specs. My brother works for Phillips 66 in their quality lab. The facility he works at does this all the time.

Is that how they increase the octane rating?

 

[Duane(Pa)]

I have an old tractor. Fuel tank adjacent to the engine. After an hour or so of mowing. the fuel is boiling in the tank. Vapors are going away constantly in the non sealed fuel system. What is left in the tank after a few sessions?

 

[16TAF]

I get ethanol free from multiple stations and in octanes 87, 89, and 90 from Southern States, Wawa, and Royal Farms. It’s all yellow here. It also smells a bit like sulfur.

 

[bwalker]

Is that how they increase the octane rating?

Diesel fuel would degrade the octane rating. More than likely it's diesel or diesel constituents that dont make grade.

 

[bwalker]

I get ethanol free from multiple stations and in octanes 87, 89, and 90 from Southern States, Wawa, and Royal Farms. It’s all yellow here. It also smells a bit like sulfur.

Its not sulfur you're smelling. Sulfur is strictly limited by the EPA in both diesel and gasoline.
However, Naptha range materials stink pretty bad. Especially from a coking unit.

 

[bwalker]

I have an old tractor. Fuel tank adjacent to the engine. After an hour or so of mowing. the fuel is boiling in the tank. Vapors are going away constantly in the non sealed fuel system. What is left in the tank after a few sessions?

Lower octane, less volatile gasoline.

 

[SawAddictedFarmer]

Astute observation. Gasoline isnt made to a recipe. Its a soup of different crap that changes by the hour. The art of refining is making money off every drop of oil you refine. In other words you blend the good with the bad in order to meet min specs.

I sure expect better than that when I'm paying the very premium price for 91 e free. Oh well.

 

[LS50713]

Here is Oregon All I have seen is the Piss color, for 92 E-Free @ near 6.00 a gallon. Thank You Tina Kotex for you gas Tax.

 

[bucketofguts]

Same here in N.C.

 

[Duane(Pa)]

Lower octane, less volatile gasoline.

Is there a spec for boiling point? I can see where that fuel tank might get upwards of 180 degrees on a hot day. The coolant is 180 plus and fan blows air back toward the tank under a sheet metal hood.