Fuel Oil Mix Question

[Freudianfloyd]

The other day I made the hour each way journey to find a station that carried ethanol free fuel. I bought 5 gallons. At the same time, I bought a bottle of Stihl HP Ultra and mixed in as it was being filled. This should give me a ratio of 50:1 which is recommended in the Husqvarna manual. However, since I just picked up my new 3120, and after Dave telling me to run it at 40:1, I'm wondering if I should add some more oil to the mix.

The problem is, I don't have any more Stihl oil, and the only oil I have is Champion synthetic blend.

Is it an issue to add some of this oil to the Stihl mix to richen it up, or should I wait until I can get to the Chainsaw store to pick more Stihl oil up?

 

[ammoaddict]

My first instinct is to say no. I know some oils don't mix well with others depending on what add package they have. But I am no expert. Hopefully someone will answer you that knows more.

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[holeycow]

I wouldn't worry about it even a little bit, but that's just me

 

[ammoaddict]

I wouldn't worry about it even a little bit, but that's just me

You wouldn't worry about mixing oils or running it at 50:1? I was unclear on which one you meant.

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[holeycow]

I would not run 50:1

 

[holeycow]

I don't know more. I'm just not overly fussy on oil for chainsaws. I just watch out for carbon and spooge.

and i mix oils without even paying much attention.

 

[ammoaddict]

I don't know more. I'm just not overly fussy on oil for chainsaws. I just watch out for carbon and spooge.

and i mix oils without even paying much attention.

Thanks for the clarification.

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[trains]

how much oil was in the bottle you purchased at the same time ?
I assume the oil comes in small 100ml, or in 1lt bottles.
so your either way lean in 5gal of fuel, or you have more to use.

I would get more of the same oil, some might work together, others might not mix well, its your saw, you dont want to find out the hard way the oil dosent mix well together.

 

[ammoaddict]

After thinking about it. I have added fresh fuel mix to a few saws that had a partial tank of a different oil mix, done it with my blowers and trimmer too. Nothing bad happened. I might be over thinking it. But with my limited knowledge I can't advise someone to mix oils in a brand new 3120xp.

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[ammoaddict]

how much oil was in the bottle you purchased at the same time ?
I assume the oil comes in small 100ml, or in 1lt bottles.
so your either way lean in 5gal of fuel, or you have more to use.

I would get more of the same oil, some might work together, others might not mix well, its your saw, you dont want to find out the hard way the oil dosent mix well together.

Yes, the bottle size would make a big difference. I just looked at Stihl website and the bottle to mix 1 gallon is 2.6 oz. They have a 12.8 oz bottle, but if you multiply 2.6 times 5 gallons, you get 13oz, not 12.8. it makes no sense to me.

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[trains]

Also, must clear up, is your gallon a UK Gallon = 4.56Lts, or 3.8 lts.

otherwise were not on the same page.

 

[Freudianfloyd]

how much oil was in the bottle you purchased at the same time ?
I assume the oil comes in small 100ml, or in 1lt bottles.
so your either way lean in 5gal of fuel, or you have more to use.

I would get more of the same oil, some might work together, others might not mix well, its your saw, you dont want to find out the hard way the oil dosent mix well together.

The bottle was meant to be mixed with 5 gallons. I don't remember the size off hand.

 

[Freudianfloyd]

Also, must clear up, is your gallon a UK Gallon = 4.56Lts, or 3.8 lts.

otherwise were not on the same page.

American gallons. 3.785 liters.

 

[atpchas]

Yes, the bottle size would make a big difference. I just looked at Stihl website and the bottle to mix 1 gallon is 2.6 oz. They have a 12.8 oz bottle, but if you multiply 2.6 times 5 gallons, you get 13oz, not 12.8. it makes no sense to me.

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It's rounding error. A 50:1 mix for one gallon calls for 2.56 oz, for 5 gallons you'd want 12.80 oz. Stihl keeps it simple by selling the one gallon mix oil in 2.6 oz bottles. What I wonder is that 2.60 oz or really 2.56 which can (presumably) legally be sold as 2.6 oz? Oh, the sleep I'll lose wondering about that mysterious .04 oz.

 

[user 122190]

50:1

 

[Andyshine77]

It would probably mix fine and work fine. Always fallow the builders suggestion on what oil and ratio. But in the end fuel and oil is relatively inexpensive so I would just use that fuel for something else and mix up a fresh batch of fuel mix. Not to start a full on oil thread, but Red Armor and Echo Power Blend are better than the Stihl oils and you can get them at the Home Depot.

 

[ammoaddict]

It would probably mix fine and work fine. Always fallow the builders suggestion on what oil and ratio. But in the end fuel and oil is relatively inexpensive so I would just use that fuel for something else and mix up a fresh batch of fuel mix. Not to start a full on oil thread, but Red Armor and Echo Power Blend are better than the Stihl oils and you can get them at the Home Depot.

Have heard great things about red armor. I quit using Stihl ultra as well. Nasty stuff.

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[Vintage Engine Repairs]

When I mixed my own for motocross, my brother in law (a Yamaha bike mechanic) advised I never mix different oils, this website is your friend -

http://www.premixcalculator.com/

 

[user 122190]

When I mixed my own for motocross, my brother in law (a Yamaha bike mechanic) advised I never mix different oils, this website is your friend -

http://www.premixcalculator.com/

A week ago I was curious about regular motor oil and synthetic motor oil. The difference and whether the two could be mixed? The synthetic oil is refined/distilled and filtered to be more pure then regular, and the mixing of the two is okay.

Lots of people think of different oils as being like oil and vinegar. Perhaps tis true in a Formula 1, 900Hp race car, but for homeowner applications and use there should be zero problems. YMMV

 

[Andyshine77]

A week ago I was curious about regular motor oil and synthetic motor oil. The difference and whether the two could be mixed? The synthetic oil is refined/distilled and filtered to be more pure then regular, and the mixing of the two is okay.

Lots of people think of different oils as being like oil and vinegar. Perhaps tis true in a Formula 1, 900Hp race car, but for homeowner applications and use there should be zero problems. YMMV

With regular motor oil you're totally correct. The refining processes are different as are many of the additives, and sometimes the source of the oil, but they will mix just fine. Now ester based oils and the true non petroleum based oils would likely not mix well, but you can't buy those at a local auto parts store. On top of all that most oils marked as conventional oils now have a percentage of synthetic just to meet the appropriate requirements.