Can red HP? Stihl 2-stroke lose its colour

[difflock]

I was using the last couple of fills from the Combi can, it seemed a bit too much like straight petrol in colour.

I soldiered on with 2 re-fills worth before finally chickening out and tipping the last 1/2 litre back into the Jerry can and remixing.

Which certainly looked a lot "pinker".

But then the Combi jar was full.

The saw was going 100% and still is, an I am proper anal-rententive about my mixes, and/but the mix had probably being sitting about in daylight even sunlight.

Thoughts?

Cheers

M

[felixthelogchopper]

How long had the mix that faded been made up? I don't tend to use it after about 2 weeks has passed, which tbh is very rare.

[tree_beard]

yes. the red dye in stihl mix can break down in bright sunlight within a couple of days. my experience of it anyway, with stihl combi-can riding around in the back of the pickup in the summer.

[mendiplogs]

yes. the red dye in stihl mix can break down in bright sunlight within a couple of days. my experience of it anyway, with stihl combi-can riding around in the back of the pickup in the summer.

 

HI TREE it no good then mate is it thanks jon

[Shane]

After ruining two MS200s a few years back we have a fixed procedure for fuel mix.

 

1. Put in the 2 stroke oil

2. Rinse the measuring jug with petrol and tip into the can

3. Add about another pint of petrol then shake the fuel container vigorously

4. Fill the container then re-shake.

When you've done the soggy jug with a hint of red oil confirms it was done properly

as does the redish foamy mix.

We usually get someone to witness the mixing too.

Sad and paranoid but saves big expense

[difflock]

OK, thanks.

I will risk saying I have never yet siezed a 2 stroke in 40 years.

I use 2 stroke mix up to six months old.

But generally stored in a shady shed.

I wouldnay worry about the loss of colour, the oil canny evaporate.

Or at least it will evaporate a lot slower then the much more volatile petrol.

Cheers

Marcus

[felixthelogchopper]

OK, thanks.

I will risk saying I have never yet siezed a 2 stroke in 40 years.

I use 2 stroke mix up to six months old.

But generally stored in a shady shed.

I wouldnay worry about the loss of colour, the oil canny evaporate.

Or at least it will evaporate a lot slower then the much more volatile petrol.

Cheers

Marcus

 

I believe it can break down though.

[difflock]

Perhaps TCD (Is he the oil specialist) would confirm, but I do not believe that oil can "break down" so easily, i.e. without extreme pressure or sustained high temps.

I could be wrong though.

Dye leaching or bleaching in sunlight, is however, entirely probable.