The GP8000E puts out 8,000 W continuously and up to 10,000 W for a few seconds when a motor starts. It runs up to 12 h at 50% load on a full 7.9 gal29.9 L tank. It weighs 207 lb93.3 kg. It takes 1.06 qt1 L of engine oil, and the source recommends 10W-30 / SAE 30.
Specifications
Units: /| Power | |
|---|---|
| Running output | 8,000 W 1 |
| Starting output | 10,000 W 1 |
| Voltage | 120/240 V 1 |
| Engine | |
| Engine | Generac OHV with EFI 1 |
| Displacement | 420 cc 1 |
| Fuel | Gasoline 1 |
| Starting | Electric start 2 |
| Fuel and run time | |
| Tank | 7.9 gal29.9 L 1 |
| Run time | 12 h 1at 50% load |
| Size and noise | |
| Weight | 207 lb93.3 kg 1Unit weight. Shipping weight is 220 lb. |
| Length × width × height | 30.2 × 27.2 × 26.5 in767.8 × 691 × 672.6 mm 1 |
| Outlets | |
| Outlets | 2 × 120 V 20 A GFCI duplex (5-20R) 1 × 120/240 V 30 A twist-lock (L14-30R) |
| Other | |
| CO shutdown | COsense 1 |
| Warranty | 3 years residential, 2 years commercial 1 |
Oil, spark plug and service
What to have on the bench before an oil change or tune-up.
| Oil capacity | 1.06 qt1 L 1 |
| Oil type | 10W-30 / SAE 30 1 |
We're still missing some service figures for this model. Have the owner's manual? Send it over.
Parts
Search links for common parts. Check the part number against the label on your unit before you buy.
| Part | Find it |
|---|---|
| Air filter | Amazon · eBay |
| Spark plug | Amazon · eBay |
| Generator cover | Amazon · eBay |
We may earn a small commission if you buy through these links. It doesn't change what we list. More.
Model numbers
This page covers model number 8929. Brands often sell the same name under several numbers with small differences, so check the label on the frame.
Compare
Often compared: Westinghouse WGen7500, Generac GP5500E, Westinghouse WGen9500DF, Generac GP6500
Questions people ask
How much oil does the Generac GP8000E take?
1.06 qt1 L. Oil type: 10W-30 / SAE 30.
How long does the Generac GP8000E run on a tank?
12 h. That's at 50% load, according to the source. More load means less time.
How much does the Generac GP8000E weigh?
207 lb93.3 kg. Unit weight. Shipping weight is 220 lb.
What's the difference between 8,000 W and 10,000 W?
8,000 W is what it can supply continuously. 10,000 W is a short burst for the moment a motor (a fridge, a pump, an AC unit) starts up.
Sources
- Generac GP8000E spec sheet (model 8929). Manufacturer, accessed November 9, 2026.
- Do it Best product listing, Generac GP8000E. Retailer listing, accessed November 9, 2026.
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