Research study – evaluated by 26 professors

Doctoral Dissertation - dr inż. Grzegorz Szyjka

Politechnika Poznańska

A comprehensive research study – positively evaluated by 26 professors revising the Doctoral Dissertation at the Szczecin University of Technology – confirmed the efficiency of MULTIMAG magnetizers.

This article reveals the results of a study of magnetizers reported on our website. Five years of laboratory and in-service tests assessing magnetizers’ effect on fuel combustion in internal combustion engines were concluded with a successful defense of a doctoral dissertation.

The study held at the Szczecin University of Technology was the first research project in Poland and in Europe of such a broad scope, covering multiple fuels and different types of magnetizers.

The purpose of the study was to assess the effect of magnetic activators on selected performance parameters in spontaneous ignition engines.

The author of the dissertation, dr inż. Grzegorz Szyjka, is a researcher at the Chair of Motor Vehicle Operation at the Szczecin University of Technology.
His dissertation was supervised by prof. dr hab. inż. Janusz Mysłowski and reviewed by professors Sławomir Luft and Tadeusz Bes. Public defence of the thesis took place in January 2007.

Featuring over 200 pages of content, the thesis is available in the Reading Room of the Faculty of Mechanical Engineering at the Szczecin University of Technology. It includes detailed supporting documents: test results, charts, calculations, analyses, descriptions, photographs, etc.

Only two types of magnetizers were considered eligible for a long-term in-depth study:

1) duct-top fuel and air magnetizers by MULTIMAG, and

2) flow-through fuel magnetizers with very powerful magnets – by another manufacturer.

The effects of MULTIMAG magnetizers can be described as: 3 x 10% and 1 x 56%


This means that MULTIMAGS delivered the following:

  • average fuel savings of 10%

  • average engine power growth by 10%

  • average torque growth by 10%

  • smoke opacity reduction by as much as 56%

The above results were considered highly positive, because the study involved mostly large cubic capacity Diesel engines, from 6842 ccm (engine 359) to 9600 ccm (engines used in VOLVO buses). In addition, in order to calculate mean results exceeding measurement errors the peak values recorded at low speeds and high loads of the engine were ignored, in accordance with the research methodology. Fuel savings in that range exceeded 16%.


Following an analysis of the literature on the subject, a number of service factors potentially affecting the tested engine’s performance and smoke opacity were chosen. A two-value fractional plan was developed, on the basis of which preliminary tests were carried out.

An analysis of preliminary tests’ results and their comparison with studies held in other research institutions made it possible to identify factors relevant for proper tests. These included: type of magnetic activators, type of fuel used to power the engine and the condition of engine oil.

In accordance with the study’s agenda, changes to basic engine parameters induced by different kinds of magnetic activator sets were monitored.

During the tests, engine 359 ran on diesel. In certain test cycles it additionally ran on other fuels with different physical and chemical properties:

» summer diesel fuel, » low-sulphur diesel (EKODIESEL PLUS 50), » pure rapeseed oil, » rapeseed oil methyl ester,
» BIOXDIESEL mixture, containing 70% of diesel, 25% of rapeseed oil methyl ester and 5% of dehydrated ethanol.

The engine oil used for lubrication was LOTOS DIESEL 15W/40 CG - 4/ SH.


Test results were presented in the form of aggregated external engine profiles, described in detail in chapter 4.1 of the doctoral dissertation. Based on the achieved results, curves of the following parameters were developed: power N = f(n), torque, M = f(n), instantaneous fuel consumption g = f (n), hourly fuel consumption G = f (n), infrared radiation absorption coefficient k = f (n) and exhaust gas temperature t = f (n).


To ensure maximum reliability of the study, the method of double verification of magnetizers’ performance was used. This means that power, torque, fuel consumption, smoke opacity and exhaust gas temperature were measured for:

a) engine with magnetizers installed, after 1 hour and then after 10, 20, 40, 60, 80, 100, 120, 140, 160, 180, 200, 220, 240, 260, 280, 300, 320, 340, 360, 380, 400, 420, 440, 470 and 500 hours of operation, and subsequently – after:


The range of analyzed engine speeds was from 1200 to 2700 rpm.

In the case of „a” (magnetizers fitted on the engine), less fuel consumption, more power, greater torque as well as lower smoke opacity and exhaust gas temperature were observed.

In the case of „b” (magnetizers removed from the engine), clear growth in fuel consumption, less power, smaller torque as well as higher smoke opacity and exhaust gas temperature were observed.

The underlying evidence includes numerous test results and external engine profiles presented in the dissertation.

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