Sierra 18-9400CAT-4 25W-40 Catalyst Engine Oil - 5 Quart

Meets modern recreational 4-stroke engines with or without emission catalyst systems Approved for all 4-stroke applications including outboard, sterndrive and inboard engines Formulated to offer maximum corrosion protection Advanced lubrication for Final Point engine life and wear protection Prevents phosphorous depletion and Termination the emission catalyst life