A number of Pertalite users, both cars and motorbikes, were busy complaining about the use of Pertalite after the price went up. They said, Pertalite runs out faster with the same mileage.
Responding to this, a lecturer from the Bandung Institute of Technology (ITB) Energy Conversion Expertise Group, Tri Yuswidjajanto Zaenuri, said that in theory, one of the possibilities for Pertalite to be more wasteful is that it contains less energy than the previous Pertalite.
Tri explained that the energy in the fuel depends on the chemical compounds in it. These chemical compounds are carbon and hydrogen. If there is a change in the composition of these compounds can result in changes in density or density.
He explained that when the density changes, the calorific value per liter of fuel also changes. The calorific value is the energy content of the fuel or the amount of heat energy released per unit mass of fuel in kilo joules or kilocalories per kilogram.
For example, the size of gasoline is both one liter, but the density is reduced from 820 to 770 grams, the use of gasoline will definitely be wasteful. “When one liter contains less energy, automatically what is felt is more wasteful of fuel,” Tri explained to secondsEduWednesday (21/9/2022).
Pertalite with a lower energy content could be due to the quality of petroleum. “Because the price of crude oil is high, maybe because you want to buy a slightly lower price, buy one with a lower energy content but still in specifications,” he said.
The problem, said Tri, is that in the specification of oil and gas as a condition whether or not fuel is sold in Indonesia, the calorific value is not taken into account. “Therefore, there is no provision for calorific value in the specifications,” he said.
Tri also conveyed a suggestion to conduct a comparative test between Pertalite after and Pertalite before the price increase was impossible. “Samples of Pertalite before the price increase are no longer available, and the specifications for fuel change in each production batch,” he said.
In order to avoid confusion, Tri said the information related to the Pertalite specifications was actually in the Pertamina Fuel Depot. “Every time there is a receipt of fuel from a refinery there must be a Certificate of Quality (CoQ), so that changes can be compared from time to time,” he explained.
The graduate of S3 Technische Universitat Clausthal, Clausthal, Germany, continued, another possibility about Pertalite, which is more extravagant, could also be just a suggestion.
When the price of Pertalite was lower than the current price was not a concern, but after it rose the public began to highlight the type of gasoline used.
“Could it be because of suggestions, before when it was cheap it was not noticed. Now when the price goes up (even though it is still subsidized at Rp. 8 thousand more per liter) it continues to be noticed. So I just realized that the motorbike is wasteful,” he said.
Pertamina Claims Pertalite Specifications Have Not Changed
Reporting from detikFinance, Pertamina confirmed that the quality of fuel oil (BBM) type Pertalite (RON 90) has not changed.
Pertalite specifications that are currently circulating through official distributors are in accordance with the Decree of the Director General of Oil and Gas Number 0486.K/10/DJM.S/2017 concerning Standards and Quality (Specifications) of 90 Types of Gasoline Fuel Oil Marketed Domestically.
“The limitations in the specifications of the Director General of Oil and Gas that indicate the evaporation rate at room temperature include the Reid Vapor Pressure (RVP) parameter. Currently the RVP test results from Pertalite distributed from Pertamina’s Fuel Oil Terminal (TBBM) are still within the permitted limits, namely in range of 45-69 kPa (Kilopascal),” said Pertamina Patra Niaga Corporate Secretary Irto Ginting as quoted from detikFinanceThursday (22/9/2022).
Pertamina guarantees that all BBM products, including Pertalite, are distributed through official distribution agencies such as gas stations and Pertashop according to specifications and through strict quality control. Meanwhile, fuel products that do not meet the specified specifications will not be distributed to the public.
“Pertamina is committed to distributing quality fuel products according to specifications. Through quality control, products that do not meet specifications will not be distributed to distributors,” said Irto.
Tips for Saving Pertalite
Pertalite itself is included in the material that can expand. This occurs when Pertalite is exposed to heat or high temperatures.
“The density goes down, [kandungan massa jenis dalam bensin] the previous liter was different. the difference, [ada pada] the density is low and the density is high because the fuel is hot. If you weigh [masih] both one liter,” he explained.
He advised motorists not to fill Pertalite during the day or when Pertalite had just been put into the gas station. This is because the temperature is still high causing Pertalite to expand and run out faster.
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