In a letter dated June 13, 2018 to its customers, Shell Oil Products US (SOPUS) announced it will implement a price increase of up to 10% on finished lubricants, effective July 16, 2018. SOPUS stated that in certain instances, the effective date and/or the amount of the price change may fall outside of these parameters. Shell attributed this adjustment in part to increasing costs of raw materials used in the production of its products as well as increasing delivery costs.

In a letter dated June 14, 2018, Chevron announced a general price increase of all lubricating oils and greases up to 9% effective on August 1, 2018. Chevron stated that in certain instances, specific products may increase in amounts that are outside of this range. Chevron attributed this price increase to the increasing costs of raw materials impacting the manufacturing of its products.