2 Stroke

[sophie4]

How can you tell if petrol has already had 2-stroke oil added? The oil we use(d) has no real colour and at 100:1 I'm not sure it would show even if it did. Any solutions much appreciated.

 

[Severnman]

You keep it in a can marked '2 stroke only'......

 

[VicS]

Let some evaporate. If its got oil in it it will leave an oily film

Letting some evaporate on some paper might be a clever idea as any oil will leave a translucent mark on the paper, but compare it with fresh petrol with no oil added.

I assume this is for an outboard. Add oil if in the slightest doubt (most outboards would be better off with 50:1 anyway). But if you really dont want to "risk" running on 50:1 then mix it in with some fresh correctly mixed a bit at a time.

Alternatively use it for the lawnmoer or the neighbours lawn mower.

Better still put it in the petrol tank of my car!

 

[Searush]

It will feel slightly oily to your fingers & should smell slightly different, fewer ethers are noticeable.

 

[ghostlymoron]

Assume it hasn't and put some more in. At 1/100 it won't mess up the engine if you have 2 lots of oil in.

 

[seumask]

To me the petrol with oil in it usually looks darker when I look into the plastic can or plastic tank, however this may not be a reliable indicatior

 

[itsonlymoney]

[ QUOTE ]
Assume it hasn't and put some more in. At 1/100 it won't mess up the engine if you have 2 lots of oil in.

[/ QUOTE ]

Agreed, if its for a 2 stroke outboard then no harm with double the oil, may just smoke a bit.

 

[reginaldon]

I only ever add the oil just before adding it to my outboard tank. after problems with Yamaha 5 and 100:1, the outboard specialist says he always uses 50:1 in them