When an oil film breaks down, it is said to have "sheared," losing its viscosity and lubricating properties. 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.
Why 20w40 Oil Upgrade Might Be Holding Your Engine Back
Understanding these drawbacks is essential for optimizing engine protection, performance, and longevity, especially for modern motorcycles that demand specific lubrication characteristics. Using 20w40 oil in these applications can lead to suboptimal performance.
These engines often feature tight clearances, roller rockers, and advanced valvetrains designed to operate optimally with lower-viscosity oils. This initial period of inadequate lubrication, known as the critical wear phase, can lead to increased cylinder wall scoring and bearing wear over time.
Why 20w40 Oil Upgrade Might Be Holding Your Engine Back
A compromised oil film leads to metal-on-metal contact, which is the primary cause of engine wear. Riders pushing their machines hard may find that a synthetically formulated 10w40 offers superior protection despite having the same high-temperature rating.
More About 20W40 motorcycle oil disadvantage
Looking at 20W40 motorcycle oil disadvantage from another angle can help expand the discussion and give readers a second clear paragraph under the same section.
More perspective on 20W40 motorcycle oil disadvantage can make the topic easier to follow by connecting earlier points with a few simple takeaways.
