Engine Oil; Engine Specifications - MerCruiser Axius 350 MAG User Manual

IMPORTANT: When operating a Mercury MerCruiser engine on gasoline containing
alcohol, do not store the gasoline in the fuel tank for long periods. Whereas cars normally
consume alcohol‑blend fuels before they can absorb enough moisture to cause trouble,
boats often sit idle long enough for phase separation to take place. In addition, internal
corrosion may take place during storage if alcohol has washed protective oil films from
internal components.

Engine Oil

To help obtain optimum engine performance and to provide maximum protection, we
strongly recommend the use of the following oils listed in the order of recommendation:
1. MerCruiser / Quicksilver Synthetic Blend, NMMA FC‑W rated, 4 cycle oil.
2. MerCruiser / Quicksilver 25W40 NMMA FC‑W rated oil.
3. A NMMA FC‑W rated oil.
4. MerCruiser / Quicksilver 4‑cycle 25W40, non FC‑W rated oil.
5. A good grade straight weight detergent automotive oil per the operating chart below.
NOTE: The use of non‑detergent oils, multi‑viscosity oils (other than as specified), non
FC‑W rated synthetic oils, low quality oils or oils that contain solid additives are specifically
not recommended.

Engine Specifications

NOTE: Performance ratings are obtained and corrected in accordance with SAE J1228/
ISO 8665 Crankshaft Power.
NOTE: All measurements are taken with the engine at normal operating temperature.
90-899883234 JANUARY 2008
MerCruiser/ Quicksilver Synthetic Blend, NMMA FC-W rated, 4-cycle oil
MerCruiser / Quicksilver 25W40 NMMA FC-W rated oil
A NMMA FC-W rated oil
MerCruiser / Quicksilver 4-cycle 25W40, non FC-W rated oil
SAE 20W
32° F
0° C
SAE30W
50° F
10° C
AIR TEMPERATURE
Section 4 - Specifications
SAE40W
8082
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