Oxidation Stability Across Fuel Types, Feedstocks, and Biofuel Content with RapidOxy 100 Fuel

Ensuring oxidation stability is critical across all fuel types – from fossil diesel to renewable blends – but traditional test methods can be slow, inconsistent, and difficult to apply across diverse compositions. Anton Paar’s RapidOxy 100 Fuel offers a fast, standardized, and fully automated solution for measuring induction periods across a range of fuel types.

An automated solution for fuel oxidation stability testing

Based on the Rapid Small Scale Oxidation Test (RSSOT), Anton Paar’s RapidOxy 100 Fuel determines oxidation stability in diesel and spark ignition fuels by measuring the induction period (IP) for fuels ranging from B0 to B100 diesel and all gasoline types. It is the only automated RSSOT instrument compliant with EN 16091, ASTM D7545, and ASTM D7525, and is officially accepted as a faster alternative to both EN 15751 and ASTM D525.

Faster, safer testing for spark ignition fuels

A key advantage of the RSSOT method is its versatility. Using small sample volumes (5 mL) and precise temperature and pressure control, Anton Paar’s RapidOxy 100 Fuel enables fully automated testing with results in just 31 minutes for gasoline – up to eight times faster than ASTM D525. (For diesel fuels, it delivers results in 60 minutes – 20 times faster than EN 15751.)

In addition to shorter test times (31 vs. 240 minutes), RSSOT applies a consistent break point definition (10 % pressure drop), enabling reliable results even when ASTM D525 fails to trigger. RapidOxy 100 Fuel eliminates the need for a burst disk and includes built-in safety features such as automatic overpressure shutoff and a locking safety hood.

Reliable performance across fuel types

The versatility of RapidOxy 100 Fuel extends to renewable fuels such as hydrotreated vegetable oil (HVO) and gas-to-liquid (GTL), which have recently gained approval for commercial use worldwide. As with fossil-based fuels, these alternatives must meet the same specifications, including requirements for oxidation stability. In a repeatability study of the RSSOT method using HVO and GTL, four consecutive tests per fuel showed maximum deviations of just 2.65 minutes (HVO) – well within the limits defined by EN 16091. This confirms RSSOT as a reliable tool not just for fossil fuels, but also for new-generation renewable alternatives.

Anton Paar’s RapidOxy 100 Fuel delivers rapid, reliable, and repeatable oxidation stability testing across a range of fuel types. Fully compliant with international standards and engineered for lab safety and efficiency, it streamlines workflows and accelerates product development and release.

Learn more about RapidOxy 100 Fuel.