Honda EU3000iS oil type and capacity, spark plug and battery
GarageDex's data from Honda's own published specs: the Honda EU3000iS takes 10W-30 oil (18 oz (0.55 L)) and an NGK BPR6ES spark plug gapped 0.028-0.031 in (0.7-0.8 mm). It is rated 2,800 running watts and 3,000 starting watts.
Shop 10W-30 oil The spec in the Honda EU3000iS manual
Key takeaways
- Oil capacity: 18 oz (0.55 L). Add it in stages and stop at the dipstick's full mark rather than pouring the whole amount at once.
- Spark plug: NGK BPR6ES, gap 0.028-0.031 in (0.7-0.8 mm).
- Every value on this page is quoted from Honda's own manual or spec page, linked beside it.
| Item | Spec | From the manual |
|---|---|---|
| Engine oil | SAE 10W-30API SJ or later, for general use | “SAE10W-30 API service category SJ or later (or equivalent) is recommended” source |
| Oil capacity | 18 oz (0.55 L) | “Maximum oil capacity: 18 oz (0.55 L)” source |
| Spark plug | NGK BPR6ESHonda 2023 manual 31ZT7620 lists BPR5ES (NGK) / W16EPR-U (DENSO) for later units | “Spark Plug Type BPR6ES (NGK)” source |
| Spark plug gap | 0.028-0.031 in (0.7-0.8 mm) | “Electrode Gap 0.028–0.031 in (0.7–0.8 mm)” source |
| Starter battery | 12 V 8.6 Ah (10 HR) | “Battery: 12 V 8.6 Ah (10 HR)” source |
| Fuel tank | 3.43 gal (13.0 L) | “Fuel tank capacity 3.43 US gal (13.0 L)” source |
| First oil change | change oil after first 20 hours | “First 20 hours Change engine oil.” source |
Parts for the Honda EU3000iS
Each Buy button searches Amazon for the exact spec in the manual.
As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.
Other Honda generators
Sources: Honda EU3000iS Owner's Manual (PDF, 2020), Honda EU3000iS product page. If your unit's own manual or label differs, follow it.