MC1 Trim Fluid

[STalak]

I have searched and scanned other threads and while I see a lot of options, I don't seem to see a definitive answer.
I have a 73 MC1 (888) which states to use non detergent 20w oil. Wondering what the consensus is to use. I think I have narrowed it down to 3 choices (but open to a definitive answer)
30w non detergent
Merc trim fluid
Jack oil

 

[Droid]

Since 20W is essentially non existent, use the Mercury tilt & trim fluid.

 

[kghost]

Do a Google search for
20W non detergent oil.

You will be surprised what you will find

 

[Dieter]

I have searched and scanned other threads and while I see a lot of options, I don't seem to see a definitive answer.
I have a 73 MC1 (888) which states to use non detergent 20w oil. Wondering what the consensus is to use. I think I have narrowed it down to 3 choices (but open to a definitive answer)
30w non detergent
Merc trim fluid
Jack oil

A jack oil will be fine. I bought ISO (I think) 32 jack oil at the local auto parts store works great for me, you can also use dexron 3 as well just dont mix different fluids

 

[Candy Gramformongo]

Hydraulic fluid sold at O'Reilly for Bobcats and snow plows works great and is dirt cheap.