The Utility Regulation and Competition Office (‘OfReg’) of the Cayman Islands confirms that there are 11 Rubis and 11 Esso (SOL) petrol stations in the Cayman Islands, all with attached convenience stores.
There is only one independently branded fuel station in the Islands called Refuel which markets ethanol and biodiesel blended fuels. As of July 2019, the average full-service price for premium, regular and diesel fuel were CI$4.97, CI$4.54 and CI$4.59 respectively, although prices vary from one station to another. Self-service petrol prices are typically 5¢ less than full-serve prices. At the time of going to press, the cost of premium petrol in Florida was in the region of US$3.24 per US gallon (3.785 litres) or CI$2.59. The average price of a litre of fuel in the UK is around £1.28 for petrol and £1.34 for diesel per litre.
Weekly prices for retail fuel across the Islands are posted on OfReg’s website. The (import) duty component of gasoline is 75¢ per imperial gallon and 85¢ for diesel.
The quality of gasoline sold in Cayman is equivalent to a mid-grade unleaded (octane level 89) and a super premium unleaded (octane level 93) often sold in the US. Some high performance cars will experience problems if they are not run on the highest octane fuel available. Refuel has introduced E10, a type of renewable gasoline containing 10% ethanol which reduces emissions while naturally boosting octane levels. E10 is sold at octane levels 87, 90 and 93. They also stock 2 grades of Ultra Low Sulphur Diesel B5 (up to 5% biodiesel) and B20 (20% biodiesel) which have similar emissions-reducing effect and high cetane levels. These fuels, which are used throughout the US and the UK, are compatible with most cars. Check your car’s owner’s manual to be sure.
Scotts Landing, at the Barcadere Marina sells diesel and gasoline to cars and boats. They add a high performance fuel additive called ValvTect which increases the quality of the fuel. It is specifically formulated for marine engines but works very well on automobiles as well. Cayman Islands Law states that all fuel stations must display their fuel prices in CI dollars and imperial gallons, except at Marinas where CI dollars per US gallon (which is approximately 20% less per volume than imperial gallons) is allowed. Make sure that you are being charged appropriately.