ROWE HIGHTEC POWER BOAT 4-T 10W-30 is a high-performance mineral-based engine oil developed specifically for four-stroke marine engines. Its formulation is tuned to the unique demands of the water, where engines run hot, under sustained load and in the presence of moisture. The result is dependable lubrication and protection for inboard and outboard power units.

Purpose and specifications

This oil is intended for 4-stroke inboard and outboard boat engines. It meets API SM and JASO MA, and fulfils the marine requirements of NMMA FC-W and NMMA FC-W Catalyst Compatible, making it suitable for engines with and without catalytic aftertreatment. The SAE 10W-30 grade provides a balanced film for typical marine operating conditions.

• 5L container for a complete marine engine oil change
• Easy circulation at start-up with the 10W cold rating, and a stable film at running temperatures around 100 C and above
• Strong protection against wear and corrosion in the humid marine environment, keeping internals clean
• Catalyst-compatible formulation that safeguards exhaust aftertreatment on modern outboards

When to use / change?

Choose this oil for four-stroke marine engines that call for an NMMA FC-W lubricant. Change the oil at the engine maker's service interval, commonly once per season or every 100 operating hours, whichever comes first. The 10W-30 grade suits a broad ambient range of roughly -25 C to +40 C. Stored sealed in a cool, dry place, shelf life is approximately 5 years.

Frequently asked questions

Is this for two-stroke or four-stroke engines?
It is a dedicated four-stroke oil for inboard and outboard engines. Do not use it in two-stroke marine engines.

Is it safe for engines with a catalytic converter?
Yes. It meets NMMA FC-W Catalyst Compatible, so it is suitable for catalyst-equipped outboards.

How often should I change marine oil?
Typically once per season or every 100 hours of use. Follow your engine manual for the exact interval.

Suitable for: all 4-stroke inboard and outboard marine engines. Always verify the exact approval against your vehicle's owner manual before use.