Running from Dural, Old Northern Road heads directly north to Wisemans Ferry and then you can continue over the ferry to St Alban's. All up it's only an hour and a half and is a nice relaxing ride through rural Sydney. 

Fuel

There's fuel in Dural and Wisemans

Dural: Ampol - Shell - BP - Caltex

Wisemans Ferry: Caltex

Food

St Albans: Settlers Arms Inn

Wisemans: Wisemans Inn Hotel - Heritage Valley Cafe - Convict Road Kiosk

Dural: Maccas -