I just got a copy of the 2020 Top Oil Calendar. Within the calendar are a list of promo codes for 2020.
WINTER20 - Valid 08.01.20 to 20.03.20
SPRING20 - Valid 06.04.20 to 14.06.20
SUMMER20 - Valid 01.06.20 to 31.08.20
AUTUMN20 - Valid 07.09.20 to 30.11.20
Valid dates may not be exact but extracted what info was in the calendar.
No details given on discounts
Brings it down to 370
Going to wait another week and see.....