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5–10 kW Diesel Generator Fuel Consumption

Manufacturer-documented fuel consumption for 60 5–10 kW Diesel generator sets — median 0.63 gal/h at full load, 0.40 gal/h at half load.

Compare 5–10 kW Diesel generator specs side-by-side →

Consumption by model

Model	kW	gal/h @ 50%	gal/h @ 100%	Tank (L)	Runtime @ 50% (h)
Cummins/Onan 5.0 MDKUB	5	0.37	0.55	—	—
Kohler 5EFKOD	5	0.29	0.50	—	—
Kohler 5EOZ	5	0.29	0.45	—	—
Kohler 6RFOY	5	0.26	0.50	—	—
Northern Lights NL673	5	0.07	0.08	—	—
Lister Petter HSL 8	5	—	0.40	66	—
Cummins/Onan 6 HDKAL-7	6	0.51	0.90	—	—
Cummins/Onan 6 HDKAL-9	6	0.51	0.90	—	—
Cummins/Onan 6.0 MDKUB	6	0.37	0.55	—	—
Cummins/Onan RV QD 6000	6	0.30	0.40	—	—
Generac MLT4060KVLED	6	—	0.59	214	—
Isuzu 3CA1	6	0.29	0.57	—	—
Kohler 6EKOD	6	0.29	0.50	—	—
Kohler 6ROY	6	0.26	0.50	—	—
Magnum MLT3060	6	—	0.47	114	—
Northern Lights M673	6	0.07	0.31	—	—
Northern Lights NL753	6	—	0.18	—	—
Stadco CP6	6	0.40	0.80	—	—
Cummins/Onan 7.0HDKBL	7	1.50	0.74	—	—
Kohler 7EFKOZD	7	0.40	0.69	—	—
Kohler 7EFOZD	7	0.40	0.66	—	—
Kubota J107	7	—	0.71	37	—
Aurora Generators AGi6Y	7	0.24	0.35	45	50.6
Stadco CP7	7	0.40	0.80	—	—
Generac MLG 8	7	0.32	0.63	114	93.9
Cummins/Onan 7.5 HDKAL-1	8	0.51	0.90	—	—
Cummins/Onan 7.5 HDKAL-2	8	0.51	0.90	—	—
Cummins/Onan 7.5 HDKAL-3	8	0.51	0.90	—	—
Cummins/Onan 7.5 HDKAL-5	8	0.51	0.90	—	—
Cummins/Onan 7.5 MDKWB	8	0.37	0.55	—	—
FG Wilson P7.5-2S	8	0.40	0.66	45	30.0
FG Wilson P7.5-4S	8	—	0.58	62	—
Generac QUIETPACT 75	8	0.45	0.78	—	—
FG Wilson K9.5-1	8	—	0.66	62	—
Aqt Generators KU-10	8	—	0.65	100	—
Cummins/Onan 8HDKAG	8	0.55	1.03	—	—
Cummins/Onan MDKAL	8	0.37	0.69	—	—
Cummins/Onan MDKB	8	0.26	0.45	—	—
Cummins/Onan RV QD 8000	8	0.30	0.40	—	—
Kohler 10RFOY	8	0.26	0.50	—	—
Kubota GL6000-AUS	8	—	0.63	28	—
Magnum MLT 4080	8	—	0.47	114	—
Perkins 403D-11	8	0.45	0.53	680	400.0
Simson-Maxwell SKW8 T6-T4	8	—	0.92	—	—
Kubota GL 7000	8	0.85	0.63	28	8.8
FG Wilson DCP-10	8	0.34	1.65	62	47.7
Kohler 8.5EFOZ	8	0.45	0.66	—	—
Kohler 9EKOZD	8	0.40	0.69	—	—
Kohler 9EOZD	8	0.40	0.66	—	—
Aurora Generators AGi8Y	9	0.24	0.35	45	50.6
Perkins 403A-11G1	9	1.80	2.60	60	8.8
Cummins/Onan 9.0 MDKWB	9	0.37	0.55	—	—
FG Wilson K10-1	9	0.59	—	51	23.0
Generac MLG8K	9	1.32	2.65	—	—
Kohler 9EFKOZD	9	0.50	0.90	—	—
Kohler 9EFOZ	9	0.45	0.66	—	—
Northern Lights M773L	9	0.37	0.72	—	—
Northern Lights NL773LW4	9	0.13	0.19	—	—
Generac MLT3060M	9	—	0.47	114	—
Generac MLT4060MV	9	—	0.59	216	—

Figures from each model’s own manufacturer documentation (spec sheets and manuals); runtime = documented tank capacity ÷ consumption at 50% load. Verify against the datasheet for your exact configuration.

Common questions

How much fuel does a 5–10 kW Diesel generator use?

Across 59 models with manufacturer data, full-load consumption runs 0.08–2.65 gal/h (median 0.63); at 50% load the median is 0.40 gal/h.

How long will a 5–10 kW Diesel generator run on a full tank?

At 50% load, documented tank sizes give 8.8–400.0 hours (median 47.7 h) across 9 models.