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Gear test Soltron


DISPERSANT TREATMENTS – disperse water to deprive diesel bug of its habitat Fortron


Fuel Set


Fuel Doctor


Starbrite Star Tron


Shock dose per litre: 0.2ml Shock dose cost per litre: 2p Maintenance dose p/lt: 0.2ml Maintenance cost per litre: 2p Bottle size: 125ml Bottle cost: £12.50 n soltronjersey.com CONTAMINATION


pg cATP/ml before: 62.65 pg cATP/ml after 1 day: 74.15 pg cATP/ml after 10 days: 12.39 cATP reduction: -80% FILTRATION RESULTS


Faster than control by: 49%


The flask revealed minimal gummy deposits and a low debris level. The 24-hour data shows that Soltron set swiftly to work scattering microbe colonies, and the filter result was the best on test, showing that this is a good choice for breaking up contamination to be burned in the engine. Water dispersal was incomplete, but more time or a bigger dose are likely to solve this.


Shock dose per litre: 0.5ml Shock dose cost per litre: 2.1p Maintenance dose p/lt: 0.25ml Maintenance cost per litre: 1p Bottle size: 250ml* Bottle cost: £10.38 n www.liquideng.eu CONTAMINATION


pg cATP/ml before: 17.81 pg cATP/ml after 1 day: 91.37 pg cATP/ml after 10 days: 3.68 cATP reduction: -79% FILTRATION RESULTS


Faster than control by: 40%


This product gave a very good performance, with no gunge, only fine debris and all the water dispersed. A huge peak on our 24-hour test showed that it quickly broke down colonies and lifted them into suspension. Fuel Set claims to be made from natural compounds and also to clean your fuel system as it transits – the rapid action we observed will be of help here.


Shock dose per litre: 5ml Shock dose cost per litre: 16.1p Maintenance dose per litre: 1ml Maintenance cost per litre: 3.2p Bottle size: 500ml Bottle cost: £16.13 n expresslube.co.uk CONTAMINATION


pg cATP/ml before: 49.72 pg cATP/ml after 1 day: 13.98 pg cATP/ml after 10 days: 1.91 cATP reduction: -96% FILTRATION RESULTS


Faster than control by: 42%


Fuel Doctor gave good test results, and inspection showed excellent dispersal and no gummy deposits. Some large crystals were seen at the bottom of the sample, which Fuel Doctor explain are formed from dried dead biomass which will disperse with continued use of the product. A filter change after 10-20 hours running is recommended.


Shock dose per litre: 2ml Shock dose cost per litre: 8.5p Maintenance dose per litre: 1ml Maintenance cost per litre: 4.2p Bottle size: 1lt Bottle cost: £42.43 n www.fortron.co.uk CONTAMINATION


pg cATP/ml before: 8.39 pg cATP/ml after 1 day: 28.40 pg cATP/ml after 10 days: 6.75 cATP reduction: -20% FILTRATION RESULTS


Faster than control by: 43%


Claimed to not only kill diesel bug but also clean injectors, Fortron struggled in our kill rate test, although the filter result was good and the 24-hour figure suggests rapid action. Of most concern was the jar inspection, which revealed significant gummy deposits and poor water dispersal. A heavier shock dose might well improve these results significantly.


Shock dose per litre: 0.5ml Shock dose cost per litre: 2.9p Maintenance dose p/lt: 0.25ml Maintenance cost per litre: 1.4p Bottle size: 473ml Bottle cost: £27.24 n www.starbrite.com CONTAMINATION


pg cATP/ml before: 12.38 pg cATP/ml after 1 day: 29.61 pg cATP/ml after 10 days: 0.45 cATP reduction: -96% FILTRATION RESULTS


Faster than control by: 47%


Among the best on test with a 96% kill rate, Star Tron also excelled with a 47% improvement in filter speed. However, it did leave some sticky deposits in the jar and had not completely dispersed the water. Starbrite say that their product is most effective when the boat is used, as the engine will then process the treated fuel and destroy the bug.


Fine debris passed quickly through our filter


Excellent dispersal and no sticky deposits


A good kill rate, filter result and water dispersal


Deposits and poor dispersal suggest inadequate dosing


Some deposits and water will require treatment


Practical Boat Owner 534 May 2011 • www.pbo.co.uk


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