Acura 3.5 RL Manual page 87

Follow the Severe Conditions Maintenance Schedule if the vehicle is driven in Canada or MAINLY under one or more of the Severe Driving Conditions (page 3-11):
8-4,8-5
8-4, 10-5
11-153
4-22
6-8 to 6-13,
10-10
4-33, 17-15,
22-85
11-124
10-5
14-108
15-4
19-10, 19-11,
12, 17, 18,
19,23
19-8
19-6
22-68
3-2, 3-3