Vanguard BIG BLOCK M540000, Repair Manual, Page: 11 / 168

Use the chart to select the best viscosity for the outdoor
temperature range expected. Vanguard
®
15W-50 Synthetic
oil gives the best protection in most environments as
well as superior protection for equipment operated in hot
temperatures. Engines on most outdoor power equipment can
operate well with Synthetic 5W-30 oil.
A SAE 30 - Below 40 °F (4 °C) the use of SAE 30 will result in hard
starting.
B 10W-30 - Above 80 °F (27 °C) the use of 10W-30 may cause
increased oil consumption. Check the oil level frequently.
C 5W-30
D Synthetic 5W-30
E Vanguard
®
Synthetic 15W-50
Fuel Storage
Keep the engine level at the correct operating position. Fill the
fuel tank ( A , Figure 2) with fuel. For fuel expansion, do not fill
above the fuel tank neck ( B ).
Fuel can become stale when kept in a storage container
for more than 30 days. The use of an alcohol-free fuel
stabilizer and ethanol treatment in the fuel storage container
is recommended. This keeps fuel fresh and decreases fuel-
related problems or contamination in the fuel system.
If gasoline in the engine has not been treated with a fuel
stabilizer, it must be drained into an approved container.
Operate the engine until it is out of fuel.
NOTE: DO NOT run the Electronic Fuel Injection engine out
of fuel. Fuel pump damage can occur. Make sure to add the
correct amount of fuel stabilizer to the fuel tank, and run the
engine for 30 minutes.
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