In Castrol's GO4T motorcycle oil, the "4T" stands for "4-Stroke." It is a term commonly used in the motorcycle industry to indicate that the oil is designed specifically for four-stroke engines. Four-stroke engines, which are the most common type of motorcycle engines, have four distinct phases: intake, compression, combustion, and exhaust.
The designation "4T" helps differentiate this particular oil formulation from oils that are formulated for two-stroke engines. Two-stroke engines have a different design and operate on a different principle, requiring specialized oils that are specifically formulated for their needs.
By using a dedicated 4T oil like Castrol's GO4T, motorcycle owners can ensure that their four-stroke engines receive the appropriate lubrication and protection for optimal performance and longevity.