BioDiesel...?? Is it Safe..??


Biodiesel has a shelf life of 6 months. Factors affecting the shelf life are:

       Temperature – store biodiesel at room temperature.

       Light – it is best to store biodiesel in dark drums or tanks.

       Air – the surface are of biodiesel should be kept to a minimum and in an airtight tank or drum.



Generally in the Eastern Cape biodiesel is not affected by Cold weather. As the temperature drops below +7ºC, biodiesel will start to become cloudy and the viscosity will start to increase (become thicker).


       Biodiesel cloud and gel points: 

o    Average cloud point: +7ºC

o    Average gel point: +2ºC


       Standard diesel cloud and gel points: 

o    Average cloud point: -7ºC

o    Average gel point: -17ºC



Biodiesel is an excellent fuel system cleaner while it also lubricates your fuel injector pump at the same time. Biodiesel will clean out your fuel tank and release all the dirt on the sides and bottom of the fuel tank. This dirt will become trapped in the fuel filter and may result in a loss of power due to fuel starvation. This is quite normal when starting to use biodiesel. Simply replace your fuel filter and continue driving normally. There is nothing to be gained by incrementally increasing the percentage of biodiesel blended with regular diesel. 

We suggest that you carry a spare fuel filter when you start using biodiesel so that you can do a road side fuel filter change if or when you experience a power loss. You may never have to do a roadside change as your normal services may just co-inside with the time to change your fuel filter. 

Once the biodiesel has passed all the dirt left from the use of standard diesel no more build up will occur in the fuel system.



Biodiesel dissolves some forms of plastic and rubber. This may result in leaking fuel lines on vehicles manufactured before about 1996. The most frequent leaks seem to be injector spillover lines. Carry out regular inspections of your fuel system during the first 1000km’s. Replace any fuel lines, hoses or seals with either Viton or OEM parts.



Prevent overfilling your tank and spilling biodiesel on the outside of your vehicle. If you do overfill your tank, wash spilt biodiesel off with soap and water. Try to prevent spills on asphalt as biodiesel will soften asphalt.


When approached about the issue of vehicle warranties, the National Association of Automobile Manufacturers (NAAMSA) stated that:

“The general situation at present is that vehicle manufacturers and importers will only warrant vehicles operating with biodiesel up to 5% biodiesel (B5) blended with standard diesel. The biodiesel blended must be to the established SANS 342 (view report) specification.”

Vehicle manufacturers usually use the American or European standard as the benchmark to maintain their vehicle injector warranties. Consult your dealer or manufacturer if you are unsure about your vehicles warranty.

For peace of mind Greentech Biofuel has comprehensive product liability insurance and backs our biodiesel 100%.  


The South African Government has legislated that 2% of the country’s standard diesel must be replaced with biodiesel by 2013. In 2006, South Africa used 20 billion litres of standard diesel. Blending 2% biodiesel with standard diesel equates to 400 million litres of biodiesel per year.

Refer to the Department of Energy website for the Biofuels Industrial Strategy of the Republic of South Africa dated November 2007.  



Biodiesel contains no hazardous materials and is generally regarded as safe to use. Storage, handling and use of biodiesel have a risk associated to it like any fuel. Certain fire and safety precautions must be taken.