Diesel Fuel Filtration Field Trial – PT Tsar International

The challenge 

A diesel fuel trial was conducted for PT Tsar International, Delta-Xero’s authorised partner and distributor in Indonesia to improve diesel quality in-situ: filtration unit directly fixed to the truck tank. Initial particle count measurements showed the diesel fuel was heavily contaminated, exceeding ISO 4406 cleanliness limits for clean diesel fuel.  

Customer savings & impact 

Following continuous Delta-Xero diesel fuel filtration, monitored over multiple operating hours, the trial demonstrated: 

• Fuel cleanliness improved from ISO 19/18/17 to ISO 13/12/7, classifying the diesel as extremely clean 

• Contaminants above 25 microns reduced to zero, even after repeated refuelling events 

• Lower risk of injector damage, fuel system wear, and unplanned downtime, supporting longer equipment life and reduced maintenance costs 

The full case study shows how fuel cleanliness fluctuated during operation, how quickly contamination was recovered after refuelling, and what this means for real-world diesel reliability.  

Deciding between continuous filtration and a one-off clean for your own tanks? See fuel polishing vs tank cleaning: which one does your site need.