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2 products

Outboard engines: marine standards, not car standards

  • OUTBOARD 2T — premium ashless two-stroke oil for water-cooled outboards, exceeding NMMA TCW-III and meeting the requirements of Evinrude, Johnson, Yamaha, Tohatsu and Mariner Mercury, with excellent detergency and rust protection during long periods of storage.
  • OUTBOARD 4T — four-stroke oil exceeding NMMA FC-W, resisting foam and shear, meeting HTHS requirements, with strong wear and corrosion protection. For petrol outboards and watercraft motors.

Why a garden or motorcycle two-stroke oil is wrong

An air-cooled two-stroke runs far hotter than a water-cooled outboard, and the oils are formulated for those different temperatures. TCW-III oils are ashless and built for the cooler combustion of a water-cooled engine, and critically they carry rust and corrosion protection for storage — an outboard spends much of its life not running, in humid air, with internal surfaces exposed. That is the property a garden two-stroke oil does not have.

Why car engine oil is wrong in a four-stroke outboard

An outboard runs at sustained high load and high rpm in a corrosive environment, which is not the duty cycle a car oil is designed around. NMMA FC-W addresses exactly that: shear stability at sustained rpm, foam resistance in a marine installation, and corrosion protection between uses. A car oil in an outboard shears down and offers no meaningful corrosion protection during storage.

Frequently asked questions

Can I use garden or motorcycle two-stroke oil in an outboard?

No. An air-cooled two-stroke runs far hotter than a water-cooled outboard and the oils are formulated for those different temperatures. Cyclon OUTBOARD 2T exceeds NMMA TCW-III, is ashless and built for the cooler combustion of a water-cooled engine, and carries rust and corrosion protection for storage, which matters because an outboard spends much of its life not running in humid air. It meets the requirements of Evinrude, Johnson, Yamaha, Tohatsu and Mariner Mercury.

Can I use car engine oil in a four-stroke outboard?

It is the wrong product. An outboard runs at sustained high load and high rpm in a corrosive environment, which is not the duty a car oil is designed around. Cyclon OUTBOARD 4T exceeds NMMA FC-W, which addresses exactly that: shear stability at sustained rpm, foam resistance in a marine installation, and corrosion protection between uses. A car oil shears down in this service and gives no meaningful corrosion protection during storage.

Not sure which product a vehicle, machine or fleet needs? Try the Cyclon oil selector, or send us the details and we will specify it in writing.