I wrote a testimonial last year disclosing the success I had with the use of Bi-tron (Bitron) products on my trawler F.V. Kenandale.
The testimonial indicated a saving of 11 litres per hour ie from 55 l/hr to 44 l/hr. A second sheet showed the calculations of net savings based on the mothership fuel prices.
The fuel usage has been dropping gradually until one fill gave a figure of 33l/hr. I had my son skipper the boat for the next month and the figures are as follows:
Fuel taken on board = 10974 Litres (taken from skippers log and checked against fuel company records) Engine hours since last fill = 305 hours Therefore, 10974 / 305 = 36 Litres/hour
This occurred over a 23-day period trawling. Without Bi-tron (Bitron) the boat would have used 55 l/hr, costing $484.47 per night. With Bi-tron (Bitron) 36 l/hr costs $317.10 per night, that is a saving of $167.37 each night due entirely from the use of Bi-tron (Bitron).
I strongly recommend the use of Bi-tron (Bitron) products in a trawler, provided its propeller is of the correct pitch and the engine can just achieve maximum RPM with the trawl gear on the bottom at full throttle.