So what gear oil are you going to use in your outboard this year?

[Snagglefoot]

Here's mine.

 

[SwampDweller]

Mercury Quicksilver 75/90 lower unit oil.

 

[4WD]

Had this leftover from an OptiMax I sold … so just put it in my mid sized Yam …

 

[TOMJ]

I have been using Super Tech marine gear lube for the past couple years.

 

[joekingcorvette]

Originally Posted by TOMJ
I have been using Super Tech marine gear lube for the past couple years.


This plus a few years.

 

[1978elcamino]

I will also be using ST gear oil and have been for many years.

 

[jetdoctor]

Quicksilver 90W. The 75w/90 is for 75 HP and smaller outboards. $9.50/qt at Walmart. Lower unit oil needs to be changed every 100 hrs and/or before you put the boat away for the winter. Letting water sit in a gear case over the winter is a recipe for a big repair bill. Luckily, the Quicksilver oil does not cause my Honda 90 to shift like a Mercury 115...........

 

[road_rascal]

We've been using Mystik JT-4 in our Mercury 15 and Yamaha 50. Only because the local auto parts store has it.

 

[Bluestream]

Automotive 75W90, same as all local marinas use