Asminah, N., Prasetyo, E., & Dhamayanthie, I. (2023). Evaluation of optimal time blending process on medripal 412 And Prima XP SAE 20W – 50 samples with homogenity test. Gema Wiralodra, 14(2), 681–687. https://doi.org/10.31943/gw.v14i2.431