After adding Bell Hammer Light, I noticed improvements in engine noise, torque, and fuel efficiency. I currently change oil every 6 months or 5,000km—would it be okay to extend this to 1 year or 10,000km?

[Basic Concept]
・Bell Hammer Light is an additive that improves lubrication performance and reduces metal wear, but it cannot prevent the deterioration of the oil itself (oxidation, soot, combustion products, etc.).
・Especially in diesel engines and high-mileage vehicles, oil deterioration occurs quickly, so long-term extension is not recommended.

【Guidelines for Oil Change Frequency】

• Maintaining the current “6 months or 5,000 km” cycle is the basic recommendation.

• If extending the interval, limit it to a maximum of 10,000 km, and starting around 7,000 km, check the oil condition every 1,000 km.

(Check items: color, viscosity, odor, transparency)

【Additional Advice】

• The rate of degradation varies depending on the engine's age, mileage, and usage conditions.

• Oil change frequency also serves as insurance for engine protection, so it is safer to avoid extreme extensions.

While engine protection performance has improved with Bell Hammer Light, even if you feel it is “wasteful,” it is reassuring to recognize that the oil's lifespan is a separate issue.