The CI Co-Op is the new provide of fuel for a number of States departments.
The new deal was agreed in December 2023.
The States say it will 'offer better value for money and more flexible locations for filling up.'
Currently it applies to vehicles run by Guernsey Water, Health and Social Care and Education's Pupil Transport Service.
Previously, these departments had used a locally run garage.
It's unclear whether the agreement covers States Works, which operates a large and diverse fleet.
Enhancements planned for Guernsey's second harbour
Improvements include walking and cycling paths, a cafe and children's play area and a marine centre for boat maintenance.
European praying mantis spotted in Guernsey garden
A rare visitor from Europe is thought to have been attracted by the heatwave summer and southerly winds.
Guernsey's leisure centre reopens after near week-long closure
Authorities say that all traces of Legionella bacteria have been eradicated.
Beau Sejour remaining shut over weekend
Beau Sejour is staying shut this weekend (19 & 20 September), as work continues to eradicate Legionella bacteria detected in the water system.
Flyers advertising polar opposites delivered in Guernsey
A postcard promoting safe drinking and a glossy alcohol flyer end up going through some letter boxes at the same time.
Alex Scott named in England squad
Bournemouth midfielder Guernsey's Alex Scott has been named in Thomas Tuchel's first England squad since the World Cup.
Dangerous cycling on Guernsey roads
E-bikes are being abused by youngsters riding 'three up' on machines designed for an adult and small child.
Closure ongoing at Guernsey's leisure centre
A major effort continues to trace the source of Legionella bacteria and then stop it happening again.
