Gull has announced a temporary 20c per litre drop in fuel on all sites across all grades.
The price-drop is to "give back" to customers for supporting the company through the year, it said in a statement.
"We'd like to thank all of our loyal customers for continuing to support us during this difficult year," Gull pricing analyst Crystal Feist said.
According to fuel finding app Gaspy, Gull Atiamuri in Waikato is pricing octane 91 at $1.50 per litre.
In the South Island, its store in Christchurch's Stanmore Rd has 91-grade fuel for $1.54.
The cheapest price in Auckland is at the New Lynn station - $1.66 for 91.
Feist said there's no maximum fill or minimum fill restrictions on the discount.
"Our price boards and pump prices are simply dropped from 7am today [Thursday] for as much or as little fuel as you like."
The promotion ends at midday on Friday.
