5 Best Boat Engine Lubes (Reviews Updated 2022)

This post contains affiliate links, and I will be compensated if you make a purchase after clicking on my links, at no cost to you.

Lubrication systems of outboard motors provide lubricant to the engine, improving the function of the individual parts. Boat engine lube is used to reduce friction between parts of the engine which are in contact with each other. It is an essential tool for keeping the engine running efficiently and preventing problems from occurring.

Best Boat Engine Lube

Here are our boat engine lube reviews.


Mercury Quicksilver High Performance Lube & Pump Kit

The Mercury Quicksilver High Performance Lube & Pump Kit is a complete set of boat engine lube and a pump. The lube pump kit fits most outboard stern drives. This boat engine lube is high performance and good value.

  • 32 liquid oz of high quality boat engine lube
  • Pump kit fits 3/8” – 16” drain screws
  • Package dimensions 12.1 x 8.4 x 2.8 inches
Check Price on Amazon


2. Metal Lube Engine Treatment

Metal Lube Engine Treatment

The Metal Lube Engine Treatment is a reliable, high-performance boat engine lube. This lube is made for anti-friction, and prevents wear caused by the extreme temperatures of summer and winter. Applying the lube once a year is enough for effective use.

  • Reduces noise caused by friction between metals
  • 8 liquid oz of anti friction lube
  • Lube is not lost during an oil change
Check Price on Amazon


3. YAMAHA LUB-2STRK Yamalube

Yamaha Lub 2strk Yamalube

The Yamago Lub-2STRK Yamalube is a semi-synthetic engine lube. This lube is specifically for 2 stroke outboard motor engines. It is for use on all boats except sport boats.  Works with double-braided, 3 strand, and 8 plait rope

  • Anti-wear and anti-corrosion protection
  • 1 gallon of high quality oil
  • NMMA TC-W3 formulation
Check Price on Amazon


4. QuickSilver 858058Q01 Premium Gear Lube

Quicksilver 858058q01 Premium Gear Lube

The QuickSilver 858058Q01 Premium Gear Lube is a great deal on a versatile boat engine lube. This lube is formulated to protect against excessive wear and corrosion. It is designed to be used with outboard applicators below 75HP.

  • Improved emulsifiers for added gear protection
  • 32 liquid ounces of premium lube
  • 25W-40 viscosity
Check Price on Amazon


5. Quicksilver 858064Q01 High Performance SAE 90 Gear Lube

Quicksilver 858064q01 High Performance Sae 90 Gear Lube

The Quicksilver 858064Q01 High Performance SAE 90 Gear Lube is a bestselling boat engine lube at a great price. It is specifically formulated for corrosion and excessive wear protection. This boat engine lube is compatible with outboard and stern drive applications above 75 HP.

  • SAE 90 viscosity
  • 32 liquid ounces of high performance lube
  • Extreme pressure synthetic additives for metal contact protection
Check Price on Amazon


Boat Engine Lube Buyer’s Guide

Choosing high quality boat engine lube is a wise investment for a boat owner. A relatively low priced-item, engine lube could be mistaken as not being important. In terms of maintaining the good condition of the engine, it is actually a very important item. The wear and tear of a functioning boat engine and the metals rubbing together will inevitable cause damage over time. Engine lube prevents this damage from happening.

Our buying guide reviews the best boat engine lube on the market so you can choose the right lube for your engine. Following are some common features of boat engine lube to look out for when considering which one to purchase.


Boat engine lube is the type of product which you apply periodically when the need arises. Generally, applying the lube once or twice per year will be enough. This can vary depending on the amount of mileage you will travel on your boat, which may mean you require more regular application. Getting good value by checking the amount of lube you will get for your money is a good idea. A good bottle of engine lube should last you a long time if you purchase a significant amount.


The viscosity of boat engine lube is the measurement of how easily oil pours at specific temperature. The lower the viscosity number is, the thinner the lube. This will result in easier pouring than a boat engine lube which has a high viscosity number; however these lubes are more effective at maintaining strength of film and pressure at higher temperatures.


Boat engine oils are compatible with different engine types. Some will be suited to, for example, applications above 75HP. Other lubes will be compatible specifically with 2-Stroke or 4 Stroke engines, while others will be universal.