The EU Horizon 2020 project “FlowEnhancer” aimed to reduce crude oil fouling in the tube side of shell and tube heat exchangers by investigating maldistribution of tubeside velocity. As part of the project, a test sequence was performed in a pilot-plant fouling rig to investigate how crude oil fouling is affected by pulsating flow. The results of these tests, carried out here in two parallel test sections of 3 m length and consisting of double pipe heat exchangers with 19 mm ID tubes, are presented here. The pulsation (periodically fluctuating flow velocity) was induced by opening and closing control valves to these two parallel test sections. The test conditions were 200 °C inlet temperature on the tube side (crude) and 320 °C on the shell side (hot heat transfer fluid), with velocity fluctuations around a mean of 1.2 m/s in one test-section and 0.8 m/s in the second test section. The tests showed lower fouling rates with pulsation, but also lower average heat transfer coefficients.