How often should a fuel tank be replaced?

Fuel tanks should generally be replaced upon any sign of significant damage, or, as they start to show age towards the end of their estimated lifespan. This lifespan varies slightly depending on the type of tank in use, the material it is constructed from, and the way in which it has been used and maintained.

Plastic oil tanks typically have a 10-15 year lifespan, supported by a 10-year warranty in the case of many major oil tank manufacturers. The lifespan of these containers can be affected by a wide number of factors, including the design (bunded tanks tend to outlast single skin tanks), conditions, and maintenance. Regularly maintained plastic fuel tanks can last for up to 20 years.

Steel oil storage tanks are generally thought of as a longer-lasting, more durable alternative to plastic tanks – though each material has its pros and cons. Steel’s natural resistance to damaging factors such as UV exposure, temperature change, and accidental damage assist greatly in extending its expected lifespan beyond the expected lifespan of most other fuel and oil containers, with most lasting up to or beyond 20 years.

As repairs to damaged, cracked, or split fuel tanks are generally difficult to complete, OFTEC and UK GOV guidelines highly recommend replacing tanks as soon as possible after damage.