Engine Oil Recommendations - Guardian 5240 Diagnostic Repair Manual

SECTION 1.3
PREPARATION BEFORE USE
• Slide the selector lever out towards the back of the
enclosure (Figures 5 and 6).
• Return the air cleaner cover and tighten the two
thumb screws.
3. Close the roof.
4. Reverse the procedure to convert back to natural gas.
Figure 5. 13/16 kW, GT-990 (Airbox Cover Removed)
Figure 6. 13/16 kW, GT-990 (Airbox Cover Removed)
Page 16
FUEL SELECTION
LEVER -
"IN" POSITION FOR
NATURAL GAS
FUEL SELECTION
LEVER -
"OUT" POSITION FOR
LIQUID PROPANE
(VAPOR) FUEL
PART 1

ENGINE OIL RECOMMENDATIONS

The primary recommended oil for units with air-
cooled, single cylinder or V-Twin engines is synthetic
oil. Synthetic oil provides easier starts in cold weather
and maximum engine protection in hot weather. Use
high quality detergent oil that meets or exceeds API
(American Petroleum Institute) Service class SG, SH,
or SJ requirements for gasoline engines. The follow-
ing chart lists recommended viscosity ranges for the
lowest anticipated ambient temperatures.
Engine crankcase oil capacities for the engines cov-
ered in this manual can be found in the specifications
section at the beginning of the book.
Lowest Anticipated
Ambient Temperature
Above 60° F (16° C)
20° to 59° F (-7° to 15° C)
Below 20° F (-7° C)
For all seasons
GENERAL INFORMATION
Oil Grade (Recommended)
Use SAE 30 oil
Use SAE 10W-30 oil
SAE 5W-20/5W-30
Use SAE 5W-30 Synthetic oil