when did the millionaires have their best power play percentage in a season

The Edmonton Oilers have the highest power-play percentage by a team in a season, at 32.4 percent in 2022-23.

	TEAM	PP%	SEASON	GP	W	L	T	OTL	PTS	PTS%	SOW	SOL	G	GA	DIFF	PK%	S/GP	S%	SA/GP	SV%
1	Oilers	32.4	2022-23	82	50	23		9	109	.665	0	4	325	256	69	77.0	33.59	11.8	31.37	.900
2	Canadiens	31.9	1977-78	80	59	10	11		129	.806			359	183	176	81.0	32.76	13.7	25.94	.912
3	Stars	31.8	2025-26	25	16	5		4	36	.720	2	2	85	68	17	78.5	26.00	13.1	27.84	.902
4	Islanders	31.4	1977-78	80	48	17	15		111	.694			334	210	124	83.5	31.13	13.4	28.20	.907
5	Islanders	31.2	1978-79	80	51	15	14		116	.725			358	214	144	80.2	28.76	15.6	28.86	.907
6	Penguins	30.2	2025-26	23	12	6		5	29	.630	0	3	72	60	12	85.7	26.70	11.7	28.52	.909
7	Oilers	29.5	2019-20	71	37	25		9	83	.585	2	2	223	215	8	84.4	29.58	10.6	32.03	.905
8	Islanders	29.3	1980-81	80	48	18	14		110	.688			355	260	95	79.3	30.21	14.7	30.23	.892
9	Oilers	29.3	1982-83	80	47	21	12		106	.663			424	315	109	77.5	33.33	15.9	32.42	.879
10	Canadiens	29.1	1979-80	80	47	20	13		107	.669			328	240	88	81.4	31.64	13.0	27.69	.892
11	Jets	28.9	2024-25	82	56	22		4	116	.707	2	1	275	190	85	79.4	28.22	11.9	27.18	.915
12	Rangers	28.8	1977-78	80	30	37	13		73	.456			279	280	-1	80.2	28.14	12.4	31.38	.888
13	Lightning	28.6	2023-24	82	45	29		8	98	.598	3	1	288	267	21	83.3	29.29	12.0	29.63	.890
14	Flames	28.5	1987-88	80	48	23	9		105	.656			397	305	92	80.4	33.33	14.9	29.65	.871
15	Golden Knights	28.3	2024-25	82	50	22		10	110	.671	1	5	274	214	60	75.7	30.27	11.0	26.11	.900
16	Canadiens	28.3	1978-79	80	52	17	11		115	.719			337	204	133	83.6	32.16	13.1	25.41	.900
17	Lightning	28.2	2018-19	82	62	16		4	128	.780	6	1	319	221	98	85.0	31.95	12.2	32.11	.916
18	Devils	28.2	2024-25	82	42	33		7	91	.555	2	2	240	220	20	82.7	28.10	10.4	26.35	.898
19	Oilers	27.9	2025-26	25	10	10		5	25	.500	0	2	77	93	-16	78.8	28.32	10.9	26.60	.860
20	Islanders	27.8	1981-82	80	54	16	10		118	.738			385	250	135	79.9	30.86	15.6	30.08	.896
21	Flames	27.7	1989-90	80	42	23	15		99	.619			348	265	83	79.2	34.35	12.7	25.34	.869
22	Oilers	27.6	2020-21	56	35	19		2	72	.643	0	0	183	154	29	82.5	29.89	10.9	30.66	.910
23	Maple Leafs	27.3	2021-22	82	54	21		7	115	.701	3	1	312	252	60	82.1	34.57	11.0	30.62	.900
24	Black Hawks	27.1	1982-83	80	47	23	10		104	.650			338	268	70	76.4	31.80	13.3	31.08	.892
25	Flames	27.1	1980-81	80	39	27	14		92	.575			329	298	31	80.6	27.13	15.2	33.16	.888