Mobil Constellation does 98 (Synergy 8000?)
BP Corner of Rosedale Road and Appolo does 98
BP Silverdale motorway
Mobil Quay St (90% sure on this)
That mobil in Penrose (sorry just know how to get there)
That's the only ones I've been to. All are confirmed 98, turbo Skylines don't take anything else.