Wave Ruler was a 8,138 GRT Wave-class oiler that was built in 1946 as Empire Evesham by Furness Shipbuilding Co Ltd, Haverton Hill-on-Tees, Co Durham, United Kingdom for the British Ministry of Transport.

[2] On 7 March 1947, Empire Evesham was commissioned into the Royal Fleet Auxiliary (RFA) and renamed Wave Ruler.

In May 1951, her captain refused to enter the harbour at Cairns, Queensland, Australia as there was insufficient depth of water for Wave Ruler.

It damaged Wave Ruler's steering gear and she had to be assisted by four tugs to berth for the discharge of her cargo.

Her cargo was transferred to RFA Wave Monarch on 3 October and she was refloated two days later and taken to Swansea for examination.

From 30 September 1958 to 15 December 1960, Wave Ruler was deployed off Iceland in support of Royal Navy ships participating in the First Cod War.

[5] In July 1961, Wave Ruler was one of thirteen RFA ships deployed in support of the Kuwait Crisis.

On 10 September 1962, she participated in Exercise Tucker Box 2 in the Coral Sea and in November she was at Perth, Western Australia where the Commonwealth Games were taking place.

On 21 November, a mayday was received from the Scripps research vessel Horizon, which was off St Paul Island and had a crewmember who was critically ill.

In July 1963, Wave Ruler was one of four RFA ships that escorted HMS Victorious from the United Kingdom to the Far East.

In January 1976, Wave Ruler was sold to Straits Engineers Contracting Private Ltd, Singapore for scrapping.