High asphaltene content fuels have a greater tendency to form sludge especially when blended with incompatible hydrocarbons. This precipitated sludge can then block filters, pipework, purifiers with consequences on the engine i.e. fuel-starvation, higher risk of incomplete combustion especially in low-medium speed engines.

If the paraffinic nature of the hydrocarbon medium increases then asphaltene separation may occur. We test asphaltene content of residual fuel and low-sulphur blended fuels to ASTM D3279. As part of VPS Additional Protection Service, asphaltene tests linked with TSE/TSP/TSA and SN data can provide a greater understanding and assessment of the fuel’s potential sediment behaviour and efficiency.