Assessment of Lubricating Oil Sold by Roadside Vendors in Minna Metropolis, Niger State, Nigeria
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Date
2021-09-29
Journal Title
Journal ISSN
Volume Title
Publisher
Nigerian Students Association (NiSA), Turkey
Abstract
The efficiency of automotive and non-automotive engines relies solely on the quality of the engine
oil. This study evaluate the quality of engine oil sold by some road-side vendors in Minna
metropolis. Eight oil samples were randomly collected and analyzed for physicochemical
parameters which include speciöc gravity, pour point, øash point, cloud point, kinematic viscosity,
acid value, iodine value and saponiöcation value using standard methods. The results of the
parameters analyzed were speciöc gravity (A1 (0.897), A2 (0.883), B1 (0.891), B2 (0.890), C1 (0.894),
C2 (0.908), D1 (0.899) and D2 (0.896) ), pour point (A1 (-6.2 oC), A2 (-6.5 oC), B1 (-5.9 oC), B2 (-4.5 oC), C1
(-4.7 oC), C2 (-3.6 oC), D1 (-6.5 oC) and D2 (-6.9 oC) ), øash point (A1 (256.8 oC), A2 (239.4 oC), B1 (269.2
oC), B2 (165.5 oC), C1 (175.9 oC), C2 (144.2 oC), D1 (161.8 oC) and D2 (191.2 oC) ), cloud point (A1 (-9.9 oC),
A2 ( -9.0 oC), B1 (-4.6 0C), B2 (-1.8 oC), C1 (-7.4 oC), C2 (-9.8 0C), D1 (-6.7 0C) and D2 (-4.8 oC), kinematic
viscosity (A1 (43 mm2/s), A2 (36 mm2/s), B1 (35 mm2/s), B2 (43 mm2/s), C1 (34 mm2/s), C2 (32 mm2/s),
D1 (42 mm2/s) and D2 (41 mm2/s) ), acid value (A1 (1.42 mgKOH/g), A2 (1.68 mgKOH/g), B1 (1.34
mgKOH/g), B2 (1.58 mgKOH/g), C1 (1.90 mgKOH/g), C2 (1.34 mgKOH/g), D1 (1.34 mgKOH/g) and D2
(1.34 mgKOH/g) ) , iodine value (A1 (13.1 mgI2/g), A2 (9.7 mgI2/g), B1 (10.2 mgI2/g), B2 (13.3 mgI2/g),
C1 (13.11 mgI2/g), C2 (10.8 mgI2/g), D1 (20.1 mgI2/g) and D2 (13.8 mgI2/g) ) and saponiöcation value (
A1 (196.35 mgKOH/g), A2 (143.05 mgKOH/g), B1 (167.18 mgKOH/g), B2 (192.42 mgKOH/g),
C1(173.23 mgKOH/g), C2 (143.00 mgKOH/g), D1 (147.54 mgKOH/g) and D2 (106.31 mgKOH/g).This
study revealed that the two most important parameters of engine oil, kinematic viscosity and acid
value were below and above the stipulated standards by the ASTM (48 mm2/s and 0.02-0.8
mgKOH/g). These deviations from the standard values stipulated by ASTM might be due to
adulteration of the engine oils. Therefore, Government agencies with mandate of monitoring
engine oil quality should carry out periodic evaluation of the engine oils sold by the roadside
vendors to check their sharp practices.