Generac — Changing Engine Oil
Maintenance · Engine crankcase / oil filter
From a Generac owner's manual — check it applies to your exact model before use.
Applies to: Generac In Line engine
Before you start
- After refilling the crankcase with oil, always check oil level on dipstick. NEVER OPERATE ENGINE WITH OIL BELOW THE DIPSTICK "ADD" MARK.
Procedure
- Drain the oil while the engine is still warm; warm up, shut down and drain immediately.
- Remove OIL DRAIN HOSE from its retaining clip.
- Loosen and remove OIL DRAIN HOSE CAP; drain oil completely into a suitable container.
- Install and tighten OIL DRAIN HOSE CAP and re-install into its retaining clip.
- Turn OIL FILTER counterclockwise and remove; dispose of old filter.
- Apply light coating of new engine oil to seal of new oil filter.
- Install FILTER and tighten by hand only. DO NOT OVER TIGHTEN.
- Remove OIL FILL CAP and add recommended oil; DO NOT FILL ABOVE THE DIPSTICK "FULL" MARK.
- Crankcase oil capacity is 4.0 U.S. quarts (3.8 liters).
- Start engine and check for oil leaks.
Specs & values
- Crankcase oil capacity 4.0 U.S. quarts (3.8 liters)
Source: Generac owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.