SA, or sulfated ash, is a measure of the amount of inorganic matter in a fuel. It is important to check SA because it can affect the performance of an engine. High SA levels can lead to deposits on the engine’s valves and injectors, which can reduce power and efficiency.

How to Check SA
There are a few different ways to check SA. The most common method is to use a bomb calorimeter. Bomb calorimeters measure the heat released when a fuel is burned in a closed container. The SA is then calculated based on the amount of heat released.
Another method for checking SA is to use an X-ray fluorescence spectrometer. X-ray fluorescence spectrometers measure the elemental composition of a material. The SA is then calculated based on the amount of sulfur present in the fuel.
Where to Find SA Information
The SA of a fuel is typically listed on the fuel’s safety data sheet (SDS). SDSs are available from the fuel supplier.
You can also find SA information in the following places:
- The fuel’s technical data sheet
- The fuel’s product label
- The fuel’s website
Importance of Checking SA
It is important to check SA because it can affect the performance of an engine. High SA levels can lead to deposits on the engine’s valves and injectors, which can reduce power and efficiency.
According to the U.S. Department of Energy, high SA levels can also lead to the following problems:
- Increased emissions
- Reduced fuel economy
- Engine damage
Strategies for Reducing SA
There are a few different strategies that can be used to reduce SA. These strategies include:
- Using low-sulfur fuels
- Using fuel additives
- Cleaning the fuel system
Conclusion
SA is an important factor to consider when choosing a fuel. High SA levels can lead to a number of problems, including reduced power and efficiency, increased emissions, and engine damage. By checking SA and taking steps to reduce it, you can help to improve the performance of your engine and extend its life.
Here are some additional resources that you may find helpful:
- U.S. Department of Energy: Fuel Sulfur
- American Petroleum Institute: Sulfur in Gasoline
- Society of Automotive Engineers: SAE J343 – Fuel System Deposits