4 stroke oil in a 2 stroke?

[perdidojoe]

I have a 2 stroke, I mix my oil 50:1. I was told if I could not find 2 stroke oil I could use 4 stroke oil.<br />Is this a good idea? <br />What weight oil?<br />Thanks

 

[KCLOST]

Re: 4 stroke oil in a 2 stroke?

No!<br /><br />4-stroke oil is not designed to be burned...

 

[perdidojoe]

Re: 4 stroke oil in a 2 stroke?

KCLOST,<br />Makes sense to me.<br />Thanks a lot!

 

[Chris1956]

Re: 4 stroke oil in a 2 stroke?

Joe, As an explanation. In the old days outboards were designed to run on straight 30 weight non-detergent motor oil. Two-Cycle was invented, but was not mandatory. My 1959 Johnson could (and was) run on standard (read 4 cycle) motor oil.<br /><br />Today 4 cycle oil are mostly multiweight and contain detergents, metallic additives and other items not designed to be burned in two-cycle motors.

 

[WillyBWright]

Re: 4 stroke oil in a 2 stroke?

Then again, if you have mosquito problems, the smoke would chase them away.<br /><br />If you're out in the middle of nowhere and all you have is crankcase oil, use it. But mix double oil. 2-stroke oil is far superior for lubricating 2-strokes. I have a 1960 35Hp Sea King that originally specified SAE 30 at 1 quart to 6 gallons of gas. The first outboard specific oil was just dyed SAE 30 that tinted the gas so you knew it was in there. But when genuine 2-stroke oils came out you could mix at 1 pint instead of 1 quart in most outboards where the crankshaft is fully supported with needle bearings. I've been mixing at 50:1 for years and the motor is still running fine.

 

[Bobby O]

Re: 4 stroke oil in a 2 stroke?

Only for a pinch, plug fouling and carb jet problems will show up after a while. Also run less than 75% max and greater than 25% idle. Like the doughnut in a car, only for a short term.

 

[Scaaty]

Re: 4 stroke oil in a 2 stroke?

Jeeeze...I think even 7-11 sells TCW-3 2 stroke oil. Its EVERYWHERE

 

[ZmOz]

Re: 4 stroke oil in a 2 stroke?

Yeah...if you have access to 4 cycle oil, you should be able to get 2 cycle oil. Maybe if you're stuck in the middle of a lake without gas an another boater offers you some 4 cycle oil, but even then I would ask for a tow before using it...

 

[andrewkafp]

Re: 4 stroke oil in a 2 stroke?

It's not just "2 Cycle oil" that you need. It's outboard 2 stroke oil (TCW-3) grade. The type you buy everywhere is for chainsaws. Use the best you can get and save in repairs in the long run.

 

[Nandy]

Re: 4 stroke oil in a 2 stroke?

I have a friend that for years used and still use 4 stroke oil on his outboard. I used to tell him he was using the wrong oil. He will reply back to me that 4 stroke was for 4 cylinders motors and 2 stroke oil is for 2 cylinders motors. His motor runs good anyway, not much smoke than my Yamaha back then when using 2 stroke oil.

 

[ZmOz]

Re: 4 stroke oil in a 2 stroke?

Originally posted by Nandy:<br /> I have a friend that for years used and still use 4 stroke oil on his outboard. I used to tell him he was using the wrong oil. He will reply back to me that 4 stroke was for 4 cylinders motors and 2 stroke oil is for 2 cylinders motors. His motor runs good anyway, not much smoke than my Yamaha back then when using 2 stroke oil.

Where can I find some 6 stroke oil for my inline 6?

 

[andrewkafp]

Re: 4 stroke oil in a 2 stroke?

LOL ZM...<br />Let's not bring THAT subject up..

 

[KCLOST]

Re: 4 stroke oil in a 2 stroke?

4-stroke oil is not designed to be burned...<br /><br />Hence, we have 2-stroke and 4-stroke oils...

 

[Nandy]

Re: 4 stroke oil in a 2 stroke?

Originally posted by ZmOz:<br /> Where can I find some 6 stroke oil for my inline 6?

He would probably use the 2 stroke + 4 stroke oil :grin: However, all that said, he never seem to have a problem, although he was using the wrong oil...

 

[ZmOz]

Re: 4 stroke oil in a 2 stroke?

Depends on what you call a problem. No, the engine isn't going to blow up as soon as you put in the wrong oil, but it will have increased wear and carbon buildup which wouldn't be immediately noticeable. I would consider that a problem...

 

[adelcoro]

Re: 4 stroke oil in a 2 stroke?

NO!!! UNLESS YOUR STUCK IN SOME REMOTE CANADIAN LAKE WITH BLACK BEARS ALL AROUND AND WANT OUT!! 4 CYCLE OIL IS NOT MEANT TO BE BURNT. <br />ADC