The Scottish Government is facing renewed calls to update so-called "inflated'' figures on oil production.
The disputed figures will be looked at by the Tories during their finance debate at Holyrood this afternoon.
Ministers claim oil revenue will reach £7.9 by 2016, which could be the first year of independence.
That's compared to £3.2 billion from the Office for Budget Responsibility.
Mid-Scotland and Fife MSP and Scottish Conservative Economy Minister - Murdo Fraser:
10°C
10°C
9°C