Pengaruh Penambahan Oktan Booster terhadap Daya dan Emisi pada Motor 4 Takt 110 cc

Penggunaan sepeda motor 4 tak 110 cc sebagai transportasi urban sering mengalami fenomena knocking akibat bahan bakar beroktan rendah seperti Pertalite (RON 90). Penelitian eksperimental ini bertujuan menganalisis pengaruh penambahan zat aditif octane booster terhadap kinerja daya dan emisi gas buang pada Honda BeAT 110 cc tahun 2013. Metode penelitian menggunakan pendekatan kuantitatif dengan desain Posttest-Only Control Design melalui variasi dosis aditif sebesar 0 ml (kontrol), 10 ml, dan 20 ml per liter bahan bakar. Pengujian daya dilakukan menggunakan Chassis Dynamometer pada rentang 2500–6000 RPM, sedangkan kadar emisi CO, HC, CO2 diukur dengan Gas Analyzer pada suhu kerja optimal mesin. Hasil pengujian menunjukkan penambahan aditif tidak meningkatkan daya puncak absolut mesin; daya tertinggi justru dicapai kondisi kontrol (0 ml) sebesar 7.6 HP pada 4500 RPM, sementara dosis 10 ml dan 20 ml tertahan di angka 7.4 HP. Namun, zat aditif terbukti berfungsi sebagai performance stabilizer yang menjaga kestabilan tenaga di putaran tinggi (flat powerband) hingga 6000 RPM. Pada uji emisi, dosis 10 ml memberikan hasil paling efektif dengan menekan kadar CO menjadi 0.25% dan mereduksi hidrokarbon HC sebesar 10.12% (dari 96.8 ppm menjadi 87.0 ppm). Peningkatan dosis hingga 20 ml justru memicu efek jenuh yang menaikkan kembali kadar polutan HC menjadi 92.4 ppm akibat over-concentration di ruang bakar. Kesimpulan penelitian menunjukkan bahwa octane booster tidak bertindak sebagai peningkat daya puncak absolut, melainkan sebagai penstabil kinerja, dengan dosis 10 ml sebagai volume optimum untuk mereduksi emisi secara ilmiah.
Kata Kunci: Octane Booster, Daya, Emisi, Motor 110 cc, Pertalite

=================================================================================

The use of 110 cc 4-stroke motorcycles as urban transportation often experiences knocking phenomena due to low octane fuel such as Pertalite (RON 90). This experimental study aims to analyze the effect of adding octane booster additives on power performance and exhaust emissions on the 2013 Honda BeAT 110 cc. The research method uses a quantitative approach with a Posttest-Only Control Design design through variations in additive dosages of 0 ml (control), 10 ml, and 20 ml per liter of fuel. Power testing was carried out using a Chassis Dynamometer in the range of 2500–6000 RPM, while CO, HC, and CO2 emission levels were measured with a Gas Analyzer at the optimal engine operating temperature. The test results showed that the addition of additives did not increase the absolute peak power of the engine; the highest power was achieved in the control condition (0 ml) of 7.6 HP at 4500 RPM, while doses of 10 ml and 20 ml were stuck at 7.4 HP. However, the additive has been proven to function as a performance stabilizer that maintains power stability at high revs (flat powerband) up to 6000 RPM. In emission tests, a 10 ml dose provided the most effective results by suppressing CO levels to 0.25% and reducing HC hydrocarbons by 10.12% (from 96.8 ppm to 87.0 ppm). Increasing the dose to 20 ml actually triggered a saturation effect that increased HC pollutant levels again to 92.4 ppm due to over-concentration in the combustion chamber. The conclusion of the study shows that octane booster does not act as an absolute peak power enhancer, but rather as a performance stabilizer, with a dose of 10 ml being the optimum volume to scientifically reduce emissions.