Frequently Asked Questions

Commercial Products

What is Sulphur Free Gas Oil?

Sulphur Free Gas Oil or SFGO is an eco-friendly gas oil. SFGO has a much lower sulphur level of only 10 parts per million. This fuel is used for non-road mobile machinery (NRMM) such as tractors, excavators, quarrying equipment, etc. It is dyed green in the same way as marked gas oil.

Due to the low sulphur content this fuel is better for the environment and some modern tractors now specifically require this product. It is illegal to use SFGO to fuel on the road vehicles.

What is Dipetane?

Dipetane is a Fuel Treatment suitable for use in for petrol or diesel vehicles. Working with our strategic partner Dipetane Ireland, we have developed a 275ml bottle that you can buy over the counter at participating Top Oil locations. The One Shot bottle should be added to a full tank of fuel when filling up at the forecourt. The Dipetane blends with and becomes part of the petrol or diesel combustion process. Dipetane is not an additive or detergent, and does not leave any residues in your engine.

What is Bio-Diesel?

Bio-Diesel is a non-fossil fuel made from natural, renewable resources such as vegetable oil or animal fats. The current Irish specification for transport Diesel permits the blending of up to 7% (V/V) of Biodiesel know as fatty acid methyl ester (FAME). Biodiesel does not mix with water, however the presence of water in storage tanks can permit a microbial growth. Therefore it is strongly recommended that a similar regime of housekeeping to that suggested for Ethanol, be applied to all Derv storage tanks.

What is Bio-Ethanol

Bio-Ethanol is an alcohol which can be derived from renewable resources such as sugar cane, wheat, etc. It helps the environment by reducing greenhouse gas emissions and reduces dependency on fossil fuels. The current Irish specification for petrol permits the blending of up to 5% (V/V) of Ethanol. Ethanol has a high affinity for water and so it is strongly recommended that all storage tanks are maintained free of water, at all times. This is a normal part of good housekeeping practices on any site.

What is Unleaded Petrol?

Unleaded Petrol is the most widely known product derived from oil. Also known as motor spirit or gasoline (USA), it is used for fuelling road vehicles. Petrol has a density range of about 0.71 kg/litre to 0.77 kg/litre. The energy content is  34.9 MJ/litre. Petrol floats on water; water cannot generally be used to extinguish a gasoline fire, unless used in a fine mist.

What is Diesel?

Diesel (colloquially known as White Diesel or D.E.R.V which stands for Diesel Engine Road Vehicle) or Ultra-low sulphur diesel (ULSD) is typically used as a fuel for transport and passenger vehicles. Its density is about 0.85 kg/l. When burned, diesel typically releases about 38.6 MJ/litre. Diesel is immiscible with water. Derv is treated with an antifreeze agent but it is only ‘Wintergrade’ from November to March.