Reply To: Gear Case Lubricant for older OMC

[David Stanton]

I use Sierra Premium gear oil (Synthetic Blend) in all gearcases except electric shift or old ones that need thick grease. I buy it in a 5 gallon pail. Price is right for how much you get! Approx $135 for 5 gallons at Amazon and other places. That’s $6.75/quart. Compare that to around $20 a quart for OEM gear oil.
Dave

https://www.amazon.com/Sierra-18-9600-5-Premium-Lower-Unit/dp/B00021UR28/ref=sr_1_1?keywords=sierra+18-9600&qid=1641055589&s=automotive&sr=1-1

• This reply was modified 4 years, 10 months ago by David Stanton.