Purpose and Specifications

MOTUL INBOARD TECH 4T 10W40 5L is a premium semi-synthetic engine oil designed for inboard marine engines and 4-stroke motorcycles. Its 10W40 viscosity flows easily in cold starts down to -25°C and stays thick up to 150°C, protecting against wear in harsh marine conditions like saltwater exposure and high humidity.

Meets tough specs including API SJ/CF/CI-4/CH-4/SG/CF-4 and ACEA E7, ensuring reliable lubrication for diesel and gasoline engines. The 5-liter pack suits most inboard motors, offering stable protection that cuts engine wear by binding dirt and soot for cleaner operation.

When to Use / Replace?

Use this oil in demanding marine environments or high-mileage 4T engines needing robust cushioning for worn parts. Ideal for city-like stop-go boating, dusty routes, or turbo diesels where standard oils break down fast.

• Replace every 10,000-12,000 km or 6-12 months under normal use—shorten to 5,000-7,000 km in severe conditions like short trips under 8 km, heavy traffic, or speeds over 170 km/h.
• Shelf life: 4-5 years unopened; store cool and dry.

FAQ

Q: Can I extend intervals beyond 12,000 km?
A: No, stick to 10,000-12,000 km max for semi-synthetics to avoid sludge buildup—check your engine manual and shorten 20-30% for urban or dusty use.

Q: Is 10W40 good for older high-mileage engines?
A: Yes, its thicker hot viscosity cushions worn bearings and seals better than thinner oils, smoothing rough idles in engines over 75,000 km.

Q: How often in cold climates?
A: The 10W rating handles starts to -25°C; change yearly or at 10,000 km if short trips prevent full warm-up.