Stihl Chain Saw Oil Mix 50/1

[Leefy]

I run a lot of stihl chain saws and use their oil gas mix. It is mixed in a 50 to 1 ratio. Wondering if I can use it for my little 6 hp evinrude. 1976 model. Thanks

Leefy

 

[wilde1j]

Re: Stihl Chain Saw Oil Mix 50/1

Air cooled motors use a different oil intended for air cooled motors. Use TCW3 oil in the outboards.

 

[Vic.S]

Re: Stihl Chain Saw Oil Mix 50/1

I would be more concerned about using the 2 stroke outboard engine oil in air cooled "garden machinery" than about using the "garden machinery" oil in an outboard due to the temperatures at which these air cooled engines operate.

 

[tashasdaddy]

Re: Stihl Chain Saw Oil Mix 50/1

just used the correct oil, in all your equipment. they will last longer.

 

[Bubbles Up]

Re: Stihl Chain Saw Oil Mix 50/1

Being a chainsaw nut myself, (Chainsaw Addict Disease) the difference of the two ,2 stroke oils.
The air cooled engine oil has ethylene glycol added to drop the cylinder head temp in addition to the air cooling. You did say you are using Stihl oil which is a great oil for air cooled equipment.

Outboard oil TCW3 has no ethylene glycol added but has anti corrosion additives added as the cooling comes from the fresh water intake.

Personally ,I would mix the two, 1/4 saw gas to 3/4 boat mix if they are both 50:1,just to use up the saw mix. I WOULD NEVER RUN BOAT MIX IN MY SAWS AS IT WONT COOL PROPERLY AND COOK THE SAW. I can admit I have stolen a cup of boat mix to TEST FIRE a saw only for a minute or so,then the saw will only see Stihl Ultra and 100LL (avgas)

 

[j_martin]

Re: Stihl Chain Saw Oil Mix 50/1

You said you're running the saws, not buying the fuel. Personally I don't know why you would want to run $35 a gallon JASO FC oil when $9 WallMart TCW3 oil would be better for it.

Put the money in the gas. Use any good TCW3 oil and off road gas, which is usually 91 or 92 octane with no alcohol.

 

[Leefy]

Re: Stihl Chain Saw Oil Mix 50/1

Thanks for all of the info. I hadn't thought about the price but will just buy the right stuff. Appreciate the answers. Makes sense what you are telling me. Just thought I'd mix one batch and use in both. Less mixing etc. but point well taken.

Again, thanks. Leefy

 

[WizeOne]

Re: Stihl Chain Saw Oil Mix 50/1

I know that no one wants to hear this (to their own detriment) but I run every two cylce I own on ***oil 100:1 synthetic 2 cycle oil. That even includes my near new Stihl 4 stroke 2 cycle backpack blower.

A few years back, I had a 2 cycle Kawasaki motorcylce that would foul the plugs so bad (for short trips where you never got it up to temperature) I could only get two or three short trips out of the bike before I would have to clean or replace the plugs. It would just get to the point where you could not start it. Once I switched to the 100:1, I never had that problem again. After a few years, I sold it to a friend and he still runs it today.

I had a 115 hp Evinrude on my 30 ft double deck pontoon boat. I had it for seven years before I had to sell it in a move. After breakin, I ran the 100:1 until the day I sold it. I never even had to change the plugs. It would probably get used about 8-10 weekends (30-40 gallons each) a year and every spring it would fire right up where all my friends boats were coughing, belching smoke and grinding their batteries down trying to get theirs started after winter.

I run my string edger, my handheld blower and my McCoulloch chain saw (all over 20 years old) on the 100:1 as well.

 

[wilde1j]

Re: Stihl Chain Saw Oil Mix 50/1

Why not 200:1???

 

[j_martin]

Re: Stihl Chain Saw Oil Mix 50/1

It can run 400:1 without detonation.

 

[WizeOne]

Re: Stihl Chain Saw Oil Mix 50/1

Why not 200:1???

....and what is this supposed to mean? Do you have successful experience running this mixture?

 

[rbh]

Re: Stihl Chain Saw Oil Mix 50/1

I just have to ask,
Are you not alittle afraid the piston and or the crank bearings are going to seize up at a mixture of 100:1??

 

[wilde1j]

Re: Stihl Chain Saw Oil Mix 50/1

....and what is this supposed to mean? Do you have successful experience running this mixture?

It means I don't presume to be smarter than the manufacturer. They (OMC) recommended 100:1 a number of years ago and quickly rescinded that, primarily because they experienced a number of failures with motors that hadn't been fogged for winter storage. Also, prolonged high throttle operation usually wants more than 100:1 oiling. I have a pair of 175 E-Tecs which run ~ 125:1 or more, but only up to ~ 2000 RPM. Above that, it's closer to 50:1. And this is using a very special oil, XD100. Programming for oil use is dictated by specific oil type for those motors, and garden variety TCW3 is ~ 50:1 throughout the RPM band.

It's your motors, so run whatever you want.

 

[WizeOne]

Re: Stihl Chain Saw Oil Mix 50/1

I just have to ask,
Are you not alittle afraid the piston and or the crank bearings are going to seize up at a mixture of 100:1??

Twenty plus years and counting. Never had any of the emplements break down. They never foul the spark arrestor screens, they start easier and the plugs have lasted a long time.

Just saying. This has been my experience. Someone else feels compelled to to make holier than thou smart comments to disparage my experiences, have at it.

 

[rbh]

Re: Stihl Chain Saw Oil Mix 50/1

Twenty plus years and counting. Never had any of the emplements break down. They never foul the spark arrestor screens, they start easier and the plugs have lasted a long time.

Just saying. This has been my experience. Someone else wants to make smart comments about my experiences, have at it.

That was not ment to be a smart comment, just a general question.
between the chainsaws and the weed wacker and all the rest of the two stroke equipment we use, I had never heard of anyone using 100:1 before.

 

[WizeOne]

Re: Stihl Chain Saw Oil Mix 50/1

That was not ment to be a smart comment, just a general question.
between the chainsaws and the weed wacker and all the rest of the two stroke equipment we use, I had never heard of anyone using 100:1 before.

I wasn't refering to you rbh. Your questions were reasonable and my excellent experience on the matter still stands.

One simply wants to make sure their fuel can is well mixed before use. Shake, do not stir.

 

[j_martin]

Re: Stihl Chain Saw Oil Mix 50/1

He was referring to me.

All modern ashless 2 cycle oils can run 100:1 IF THE ENGINE IS DESIGNED TO RUN 100:1. That requires centrifugal scavenging and oil routing to bearings.

An old engine, like my 1928 Graham Paige rototiller 2 cycle engine, requires 16:1, whether it's 30W non detergent, or a modern ashless 2 cycle oil.

In short, the oil mix depends on the engine, by design. I'll stick by the designer's instructions. You mix it any way you wish.

The 400:1 jab was a direct quote from advertising tripe, probably by the manufacturer of the oil you use.

My 02
John

 

[JB]

Re: Stihl Chain Saw Oil Mix 50/1

I run every two cylce I own on ***oil 100:1 synthetic 2 cycle oil. That even includes my near new Stihl 4 stroke 2 cycle backpack blower.

Huh??

 

[Cofe]

Re: Stihl Chain Saw Oil Mix 50/1

Allot of good info here, never thought of the rpm-powerband method for oil mixture.
Is there such a critter as a 4stroke two cycle?

 

[j_martin]

Re: Stihl Chain Saw Oil Mix 50/1

Allot of good info here, never thought of the rpm-powerband method for oil mixture.
Is there such a critter as a 4stroke two cycle?

Actually, that's the idea behind the VRO's being used on various engines, including most outboards. At slow speeds, 50:1 is not needed and tends to load up and foul the engine. At WOT 50:1 or better is needed. The little linkage to the oil pump varies the oil ratio depending on throttle position.

With a direct injection 2 cycle, oiling is a whole 'nother ballgame. E-tech does it very well.