Generator Blog


Biodiesel vs Your Warranty 0

Biodiesel is being treated with caution by the fuel injection equipment manufacturers and engine companies. While many support the development of alternative (non-petroleum) fuels in diesel engines, they are worried about unregulated biodiesel being used in equipment that was designed to run primarily on highly regulated #2 Diesel. A variety of source materials is used to make biodiesel, which means there are lots of undesirable finished products that could end up in your fuel tank. This is of great concern to diesel engine companies because there can be all sorts of bad stuff roaming through their equipment such as:

  • Free methanol
  • water
  • free glycerin
  • Mono-, di-, and triglycerides
  • Free fatty acids
  • Solid particles and Oxidated fuel.

If your diesel engine/generator is under warranty and you want to run biodiesel, you'd better think twice before filling up your tank.

Biodiesel Pros and Cons

In addition to petroleum, Diesel fuel can be made from various vegetable oils, including canola and soybean. The ASTM has also released a standard, D-6751, for biodiesel fuels. Stanadyne, as well as the other major fuel injection equipment manufacturers, has determined that a blend of 5 percent biodiesel that meets the ASTM D-6751 standard and 95 percent mineral diesel that meets the ASTM D-975 standard should not harm fuel system components. This blend is referred to as B5. As with ULSD, biodiesel fuel also has various advantages and disadvantages:

Benefits of biodiesel

  • Reduced exhaust emissions
  • Made from a renewable resource
  • Almost no sulfur (in the biodiesel itself)
  • Higher cetane value (51 minimum versus 40 minimum for mineral diesel)
  • Excellent lubricity

Disadvantages of biodiesel

  • *Could harm certain elastomers (seals)
  • Has poor resistance to oxidation, especially when blended with ULSD. This results in spoilage and the formation of acids and varnishes
  • Biodiesel can absorb much more water than mineral diesel
  • Has lower energy content

Most diesel engine companies including Aurora Generators will not warranty your engine if anything but normal automotive diesel fuel is used. Many businesses just don't cover fuel injectors and fuel pumps thus avoiding any disputes on what type of fuels where used and examining the engine for evidence. Have a comment or suggestion? We would like to hear from you. Please feel free to post a response.

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Cooking Oil For Fuel? 0

Don't try this at home. Just a small piece of dirt can damage your fuel injectors and fuel pump. What was not tested here is long term use of cooking oil. Diesel fuel you buy at the pump as many different additives in it. If your going to play around with your generator it would be a good idea to get some better fuel filters, extra fuel injector and fuel pump. What is also not mentioned here is the viscosity of the fuel. Cooking oil will gel faster in colder weather. Many people preheat them first. Also a car can adjust the timing and make up for the different flash points of various fuels. Your generator can not.

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Home Heating OIl for Diesel Generators

Home Heating OIl for Diesel Generators 0

#1 and #2 Diesel Fuel are the primary fuel types for mobile and fixed diesel engine applications.

When buying fuel, #1 is often labeled at the pump as "Premium Diesel" or with a Cetane number of 44 or 45. It is thinner and a better choice in the winter.

#2 Diesel Fuel is thicker. Since it is thicker, it has more lubricating properties. Diesel #2 Fuel  will gell easier in cold weather. This makes starting harder. It can also cause rough-running.

#2 Diesel is often labeled at the pump with a Cetane Number of 40

Home Heating Oil is NOT #2 Diesel oil. It is very close. It may have the same in ignition quality and lubricating ability only.  Refiners do not intend Home Heating Oil to be used in an internal combustion engine. Fuel that is intended to be burned in your furnace, may not have the smoke suppressants, ignition accelerators and biocides to kill fungi and bacteria that is generally are present in the Diesel Fuel at the pump. The ones that Automotive vehicles use.


If you use #2 heating oil in your generator, you are at risk of causing serious damage.  Using #2 home heating oil will void any manufacturers warranty.  Some of the first problems users encounter is damaged fuel pumps, fuel injectors and engine glazing.

The heating oil companies want you to buy their fuel and do not care about your engine. They will say it is the same #2 diesel fuel with red dye added to it. All they want to do is sell you fuel.  If heating oil was safe for compression engines, the fuel companies would advertise this. They do not.  Many articles can be found on this topic. Not one article can be found from a fuel company telling you any differently.

Kerosene is added to diesel fuel by some suppliers, though in small quantities. Kerosene has virtually no lubrication qualities.

Kerosene is routinely added to home heating oil, in large quantities. The furnace does not know, or care. The furnace oil pump does not have the same clearances (they are more crude, greater clearances, lower pressure...) and the kerosene will not hurt them. Most will and often do run on straight kerosene. If the oil tank is outside, the mix will be either 50/50 or straight kerosene. Kerosene does not have the same heat values.  You will not get  the same amount of power from a gallon of kerosene, as from heating oil, or diesel fuel.

Your engine needs the fuel additives that home heating oil is missing.  If you are using home heating oil, it is a sure way to cut the life of your fuel injector pump, fuel injectors and the rest of your engine.

If something fails due to fuel quality, it is not a manufacturing defect and will not be covered under any warranty

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Hiding Your Generator

Hiding Your Generator 0

Want to hide your generator? Maybe it's for noise, or you just want to protect it. Here are some images customers shared with us and their ideas.  

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