2 Stroke oil Mix question

[jonyyuma]

Now that we have a ratio??? What about water-cooled oil and air-cooled engine oil? I have a quantity of mercruiser 50 to 1 boat engine oil... I was told air-cooled has extra protection againest scuffing? I do use Stihl oil in my saws?

 

[dodge man]

At one time I had 32:1, 40:1, and 50:1, 2 stroke gas-oil mixes. I wrote on the cans with a Shaprie what they were for so as to not get confused. I now use Amsoil at 50:1 for everything. They swear it works fine at 100:1 but I just can't do it, and go 50:1 instead.

 

[jonyyuma]

I have a bottle from a Amsoil kit that states it is 100 to 1 too. it is un-opened too..

 

[oldyellr]

Now that we have a ratio??? What about water-cooled oil and air-cooled engine oil? I have a quantity of mercruiser 50 to 1 boat engine oil... I was told air-cooled has extra protection againest scuffing? I do use Stihl oil in my saws?

The oils for air-cooled and water-cooled 2-strokes are different because air-cooled generally run hotter. Also, older small water-cooled engines, like outboards, didn't have thermostats like the big outboards, so could run a lot cooler. Then there's the question of oil that's mixed with the gasoline and oil that's injected. If it's the latter engine, you don't mix anything, but you may not want to use that oil for pre-mix unless it specifically says so and gives a ratio.

Oils will usually say if they're for snowmobiles, outboards, motorcycles, chain saws or whatever. For instance, you shouldn't use a snowmobile oil in a chainsaw if you can help it.

 

[jonyyuma]

The oils for air-cooled and water-cooled 2-strokes are different because air-cooled generally run hotter. Also, older small water-cooled engines, like outboards, didn't have thermostats like the big outboards, so could run a lot cooler. Then there's the question of oil that's mixed with the gasoline and oil that's injected. If it's the latter engine, you don't mix anything, but you may not want to use that oil for pre-mix unless it specifically says so and gives a ratio.

Oils will usually say if they're for snowmobiles, outboards, motorcycles, chain saws or whatever. For instance, you shouldn't use a snowmobile oil in a chainsaw if you can help it.

This has been my feelings too..generally follow all the labels too. some speciality oils state a mixed coverage.

 

[ultrarunner]

The oils for air-cooled and water-cooled 2-strokes are different because air-cooled generally run hotter. Also, older small water-cooled engines, like outboards, didn't have thermostats like the big outboards, so could run a lot cooler. Then there's the question of oil that's mixed with the gasoline and oil that's injected. If it's the latter engine, you don't mix anything, but you may not want to use that oil for pre-mix unless it specifically says so and gives a ratio.

Oils will usually say if they're for snowmobiles, outboards, motorcycles, chain saws or whatever. For instance, you shouldn't use a snowmobile oil in a chainsaw if you can help it.

For the old Evinrude Lark circa 1958 I still use oil from 1960 in metal screw top quart containers.

The engine is seldom run anymore because all the places we loved are off limits to 2 strokes... My Uncle got a deal on a pallet of oil when a local store closed in 1960 and still have about a dozen cans... 1 can per tank of 6 gallons?

The only place I can run it is salt water or the estuary.

 

[benski]

I've had great success using Amsoil 2 stroke motor oils at the recommended ratios. And, there are indeed different formulations for different applications.
My chainsaws, weed trimmers, hedge trimmers, oil-injected outboard motors, pre-mix outboards, leaf blowers, everything gets its recommended oil, at the Amsoil specification. YMMV.

 

[oldyellr]

For the old Evinrude Lark circa 1958 I still use oil from 1960 in metal screw top quart containers.

Now that brings up a question. Should you really be using oil that's THAT old?

 

[benski]

I don't know if the additives (such as they were in the '60s) would degrade over time, but if it was me, I'd go ahead and step up to 21st century technology, and run my favorite synthetic at 50:1.

 

[ultrarunner]

Now that brings up a question. Should you really be using oil that's THAT old?

A friend sells on e-bay and said I should be selling those old cans of two stroke mix!!!

I've picked up quite a few more from the late 60's... left behind when I bought property.