Numerous former COMS buses have been preserved, including a large and notable collection at the Oxford Bus Museum in Long Hanborough in Oxfordshire.

In 1969 COMS became a subsidiary of the National Bus Company, commencing greater integration of city and country services.

An acute problem for the operator was the competition for staff with Morris Motors, whose Cowley factory was near the Oxford garage.

[14][15][16] In October 2019, it was announced that the X90 service between Oxford and London would be withdrawn from 4 January 2020, due to a 35% fall in passenger numbers since 2015 causing the route to be unprofitable.

[28] It is operated using Wright StreetDeck Electroliner battery electric buses delivered in November 2023, branded in grey livery.

[32] The service is operated by eighteen Mercedes-Benz Tourismo coaches acquired in 2019 and 2023, two of which were wrapped in advertisements for The Ashmolean museum in Oxford city centre.

[40][41][42] All Oxford Bus Company buses and coaches have automatic vehicle location (AVL) equipment installed which works via GPS technology.

[43] The AVL equipment installed on each bus or coach gives geographical location to within a few metres and is updating central control room every few seconds.

[44] The AVL equipment is also coupled to a real-time passenger information system at over 250 bus stop display screens around Oxford City and surrounding towns, and via a smartphone app.

This coupled information technology system gives the public "predicted times" of bus and coach services around Oxford City and surrounding towns.

[45] The real-time passenger information system is managed by OxonTime, which is a partnership between various bus companies and Oxfordshire County Council.

The top ten designs are voted on by the general public before being submitted by an internal judging panel to select an overall winner.