Generac GP5500 oil type and capacity and spark plug
GarageDex's data from Generac's own published specs: the Generac GP5500 takes SAE 30, 10W-30 or synthetic 5W-30 (see ambient temperature chart) oil (0.7 L (0.74 qt)) and an F7RTC or equivalent (Generac part 0K20670117) spark plug gapped 0.028-0.031 in (0.70-0.80 mm). It is rated 5,500 running watts and 6,875 starting watts.
Shop 10W-30 oil The spec in the Generac GP5500 manual
Key takeaways
- Oil capacity: 0.7 L (0.74 qt). Add it in stages and stop at the dipstick's full mark rather than pouring the whole amount at once.
- Spark plug: F7RTC or equivalent (Generac part 0K20670117), gap 0.028-0.031 in (0.70-0.80 mm).
- Every value on this page is quoted from Generac's own manual or spec page, linked beside it.
| Item | Spec | From the manual |
|---|---|---|
| Engine oil | SAE 30, 10W-30 or synthetic 5W-30 (see ambient temperature chart)Manual gives an oil chart by ambient temperature; petroleum oil supplied for break-in | “SAE 30 10W-30 Synthetic 5W-30” source |
| Oil capacity | 0.7 L (0.74 qt) | “Oil Capacity 0.7 L (0.74 qt.)” source |
| Spark plug | F7RTC or equivalent (Generac part 0K20670117) | “Spark Plug Type F7RTC or equivalent” source |
| Spark plug gap | 0.028-0.031 in (0.70-0.80 mm) | “Spark Plug Gap 0.028-0.031 inch or (0.70-0.80 mm)” source |
| Fuel tank | 5.41 US gal (20.5 L) | “Gasoline Capacity 20.5 L (5.41 US gal)” source |
| First oil change | change oil after first 30 hours | “Change oil after first 30 hours of operation,” source |
Parts for the Generac GP5500
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Other Generac generators
Source: Generac GP Series (GP5500E) Owner's Manual (PDF). If your unit's own manual or label differs, follow it.