Chemicals & Lube
About Chemicals & Lube
Fluids keep a jet ski's engine, driveline and fuel in good condition between rides and through the off-season. This category lists engine oil, gear oil, fork oil, coolant, fuel additives and sealants. Many products here are made for a range of powersports engines, so read the label for the application, and do not assume a product suits a jet ski because it appears in this list.
For oil, find the type your engine needs in the owner's manual. Two-stroke engines use two-stroke oil, four-stroke engines use four-stroke oil in the viscosity grade the manual gives, and the two should not be mixed. Gear oil, such as a 75W-90, should be used only where the manual calls for it. For fuel, an ethanol treatment or stabilizer helps when the machine sits for a while. Race fuel is for engines built and tuned for it, so use the grade your manual specifies. Sealants and bonding compounds should be used as their instructions describe.
Brands here include Lucas, Liqui Moly, Permatex, VP Racing and Sta-Bil. For cleaning products see Cleaning & Detailing, and Misc. Accessories covers tools and tie-downs. The group is Accessories.
FAQs on oils and chemicals for jet skis
What do oil numbers like 5W-30 and 20W-50 mean?
The number with the W shows how the oil flows when cold, and a lower number flows more easily. The second number shows its thickness at operating temperature. Use the viscosity grade in your owner's manual, not simply the thickest or thinnest.
Can I use motorcycle or ATV oil in a jet ski?
Only if the label and your manual agree. Check the oil type, the viscosity grade and the rating your engine requires. Some oils are made for powersports in general, but a jet ski engine may have its own requirements.
Do I need a fuel stabilizer for storage?
Fuel that sits for weeks can go stale, and ethanol blends can absorb water and age rubber parts. A stabilizer or ethanol treatment slows this. Use it as the label describes, and follow your manual's storage steps.
What is the difference between synthetic and conventional oil?
Synthetic oils are made to resist breakdown in heat and to flow better when cold, while conventional oils come from refined crude. Either must meet the grade and rating in your manual. Do not switch types without checking.
What is a liquid gasket maker used for?
It seals the mating surfaces of engine and housing covers, either alone or along with a gasket. Use it only where your manual calls for it, on clean and dry surfaces, and avoid squeezing excess into oil passages.
