This initial period of inadequate lubrication, known as the critical wear phase, can lead to increased cylinder wall scoring and bearing wear over time. Fuel Efficiency and Engine Load Thicker oils like 20w40 create greater internal friction within the engine compared to their lower-viscosity counterparts.
20w40 Oil Friction Loss Impact on Real MPG
This forces the oil pump to work harder and longer to circulate the oil throughout the engine, putting extra stress on the battery and starter motor. For riders concerned with rising fuel costs or maximizing the range of their motorcycle, this disadvantage is significant.
Riders pushing their machines hard may find that a synthetically formulated 10w40 offers superior protection despite having the same high-temperature rating. During this slow warm-up phase, vital components like the pistons, rings, and camshafts are not adequately protected, increasing the risk of microscopic damage that accumulates over many cold starts.
20w40 Oil Friction Loss Impact on Real MPG
Selecting the wrong viscosity can lead to increased wear, reduced fuel efficiency, and compromised handling dynamics. The extra energy required to pump and circulate the heavy oil places an unnecessary load on the engine, which can also contribute to higher operating temperatures and reduced overall efficiency, particularly in stop-and-go urban riding conditions.
More About 20W40 motorcycle oil disadvantage
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