Oops - added the wrong oil to 2-Stroke outboard tank

[RaymondR]

Originally Posted by Nicholson58

Do #1
WD40 is NOT oil. It will no lubricate. It may wreck the machine if you run it.

10W-40 motor oil is multigrade motor oil, probably better for it than the 2 stroke oil.

What is in 2 stoke oil (other than snake oil) that makes it better than ordinary engine oil?

[LakeSuperior]

"WD40 is NOT oil. It will no lubricate. It may wreck the machine if you run it."

It may wreck the machine but it is a lubricant.

Myth: WD-40 Multi-Use Product is not really a lubricant.

Fact: While the “W-D” in WD-40 stands for Water Displacement, WD-40 Multi-Use Product is a unique, special blend of lubricants. The product’s formulation also contains anti-corrosion agents and ingredients for penetration, water displacement and soil removal.

https://www.wd40.com/myths-legends-fun-facts/

[BlueH2Obound]

Originally Posted by Nicholson58

Do #1
WD40 is NOT oil. It will no lubricate. It may wreck the machine if you run it.

Might want to go back and read the OP's post again:
OP wrote that he added "10W-40" NOT WD-40. Giraffe's vs Parrot fish . . .

[Ballsnall]

Originally Posted by RaymondR

10W-40 motor oil is multigrade motor oil, probably better for it than the 2 stroke oil.

What is in 2 stoke oil (other than snake oil) that makes it better than ordinary engine oil?

Exactly, modern 2 stroke outboard oil has poor lubricating properties compared to a jasco rated oil and the 10w40 engine oil will be just fine. Just shake before each use but shouldn't matter if it's in the dingy.

[wsmurdoch]

Originally Posted by RaymondR

10W-40 motor oil is multigrade motor oil, probably better for it than the 2 stroke oil.

What is in 2 stoke oil (other than snake oil) that makes it better than ordinary engine oil?

Evinrude said that multiple viscosity oils should not be used.

The testing done to obtain a TC-W3 mark is explained in https://www.nmma.org/assets/cabinets...l%20(6.22).pdf

[GMS SRQ]

Under no circumstances use multi grade oil in your two stroke. The viscosity and detergent additives in the multi-grade oils, when burnt in the combustion chamber, will leave behind a residue that will stick the rings and cause total engine failure, very quickly.
Outboard manufacturers learnt about this fifty years ago (I worked for one, way back then) as single weight engine oils were replaced by multi-grades and powerhead failure rates skyrocketed. The TC-W formulation was created to solve this problem. Some makes/models are more sensitive than others but if you use only TC-W rated lube, you avoid the problem altogether.
Owners manuals can be confusing because they often mention single weight, non-additive oils (almost impossible to find today). Not surprisingly, that subtlety is lost on most owners.
Almost all two cycle outboard oils today are TC-W compliant so a non-destructive lubricant should be easy to find, anywhere in the world (my experience supports that). There are still lots of two cycle engines still in the field so I don't expect that TC-W lube is going away anytime soon.
Do not substitute air cooled two cycle (e.g. chain saw) lube unless it says TC-W. Air cooled formulations assume much higher operating temperatures than water cooled and their additives, like the multi-grades, will stick rings.