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Abstract
The portion of oil could be estimated 33 % of global primary energy consumption in 2012 (BP, 2012) and its average price – beside
the products produced from it as well - significantly increased, unlike the demand for transport which has been reduced. This tendency is
expected to remain unchanged in the long run, therefore, there is a great importance for the variety of diesel fuel distributors, in comparison of
the ratio value for each of them, and replacing them with biodiesel can be used in the comparison. We executed 3 dynamometer measurements
performed to determine three different dealers purchased diesel oil, some economical examinations of the diesel oil retail price, and the use
of biodiesel all based on the expected economic studies in the literature studies of extra fuel consumption values.
The results of these tests indicate that the differences of consumption between diesel oils can be up to 5 %, the conclusion is that distinctions
of diesel oil consumptions are almost the same when we tested the differences between diesel oil and biodiesel. This means we can reach
the same result with a high quality biodiesel as with poor quality diesel oil. This also means that– below 20% of mixing ratio we can easily
choose by prices alone. Between these prices and products ( D1, D2, D3), we can save 4.8% diesel oil by using D2, 6.2% diesel oil by using
D3 compared to D1. There could be a little revolution variance (D2: 2.9-6%, D3: 4.9- 7.1%), but this variance is under 1% so it is negligible