Plastic Oil Tanks Available through The Tank Shop Ltd. We have a great range of Plastic Oil Storage Tanks, ranging from a 650 Litre Single Skin Heating Oil Tank from Carbery to a 9250 Litre Plastic Bunded Oil Tank from Harlequin. Our range of Plastic Bunded Oil Tanks are all OFTEC Approved and come with at least a 10 year Guarantee, although they have an expected lifespan of 20+ years. All our Harlequin Plastic Oil Tanks Include delivery throughout mainland UK, so no matter where you are a Harlequin Plastic Oil Tank is a great choice. Our Plastic Single Skin Oil Tanks are great value for money and can be fitted in certain areas of the UK. Please note that additional bunding may be required, always seek professional advice before purchasing. Our Carbery Plastic Single Skin Oil Tanks come with a market leading 5 year guarantee, and Carbery have been making these tanks for over 40 years, so they know what their doing!