Your generator is only as reliable as the fuel sitting in the tank.
It has been sitting there ever since, slowly going off, while everyone assumes it is fine because the tank is full.
Diesel does not keep. Left in storage it separates, absorbs water out of the air, grows bacteria and fungus, and forms sludge that settles on the bottom of the tank. Then the day comes when the generator needs to run for eight hours straight, it draws hard from the bottom of that tank, and the filters block.
Fuel-related failures are one of the most common reasons a standby generator dies during an outage. They are also one of the easiest to prevent.
Tanks breathe as the temperature changes. Warm damp air comes in, cools, and condenses on the inside walls. Water is heavier than diesel so it collects at the bottom — exactly where the fuel pickup is.
Where water and diesel meet, bacteria and fungus grow. The result is a dark slime, often called diesel bug, that clogs filters and eats away at the tank.
Diesel oxidises as it ages and forms heavy sticky deposits. Today’s low-sulphur diesel and biodiesel blends are more prone to this than older fuel was.
Steel tanks corrode from the inside once water is present, and the rust ends up in the fuel.
We check the condition of the fuel before recommending anything, so you are not paying for a service you do not need.
Separated out of the fuel and taken away.
Staged filtration removes sludge, rust and biological matter down to fine tolerances.
We draw from the bottom of the tank, where the trouble lives, rather than skimming the clean fuel off the top.
Biocide or stabiliser, if the test results call for it.
Before and after condition, in writing, for your maintenance record.
None of these need a technician to spot. If any of them sound familiar, the fuel is the first place to look.
Usually, yes — and considerably less disruptive. Disposing of a few thousand litres of contaminated diesel is expensive and slow.
No. Polishing is done with the system in place and your generator still available.
Have the fuel tested. If it comes back clean, you have peace of mind and we will tell you to leave it alone.
Yes. Fuel testing and polishing are available as standalone services.
Lab testing of fuel, oil and coolant — this is what tells us whether the tank needs polishing.
The test that draws hard from the bottom of the tank, where the trouble lives.
Tank issues, level senders, day tanks, transfer pumps and containment.
A sample, a lab result and an honest answer. If the fuel is clean we will tell you to leave it alone.