Red Gasoline

[MStiller]

I've tried to figure this out, but have come up with nothing so far, so maybe someone here can help me.


The fuel in our vehicle is turning red, and we can't figure out why. We put new fresh gas in our gas tank, and it's fine, and if we sample the gas from the tank, it's normal. But if it sits in the rubber fuel lines (we bought a roll of 1/4" fuel hose from Jegs) for any decent amount of time (say a day or 2) it starts to turn orange, and if we leave it there for a week+, it looks pretty red.

The engine runs fine on it regardless of color, but we'd just like to get a handle on it. Any ideas?

 

[patprimmer]

What colour is the liner of the fuel line.

Is there any signs of degradation of the inside layer of the fuel line.

Have you changed fuel type, like say to E10.

It is probably dye leaching from the rubber, but maybe the rubber degrading and dissolving. There is a very small chance a chemical in the rubber is leaching out and reacting with the dye in the fuel to change it's colour.



Regards
Pat
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[MStiller]

There are no signs of degradation of the fuel line, and we haven't changed fuel type (Premium Unleaded the whole time), so nothing new there. It doesn't seem to be affecting anything adversely, we're just curious.

 

[786392]

In all fairness
the material of fuel line is getting dissolved in very very small amounts and

on coming in contact with the fractions of gasoline blend in use(are working as solvent)

giving this initially 'orange' and aged 'red' gasoline colour and if you change the micron size to even finer of any fuel filter downstream of these hose connections& upstream of combustion intake

You probably will find something rtained at fine fuel filter;over a period of time indeed.

Just a wild thought have you recently changed the supply source of 'premium unleaded gasoline grade'if so,then This could be the reason.

Best Regards
Qalander(Chem)

 

[RossABQ]

Are you sampling downstream of a filter? The media bonding material may be a contributor, common colors are orange in filters I've cut open.