Running In Oil / Engine Break In Oil SAE 30
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SAE 30 Running-In Oil Mineral Break-In Fluid
Premium Quality Engine Conditioning Lubricant
This SAE 30 Mineral Running-In Oil is a specialized lubricant engineered specifically for the critical first hours of an engine's life. Whether you have a newly rebuilt classic car engine, a high-performance motorcycle, or a modified diesel unit, this fluid provides the controlled environment necessary for piston rings to bed into the cylinder bores and valves to seat correctly. Unlike modern synthetic oils which can be "too slippery" for new components, this mineral-based formula allows for the necessary boundary lubrication required to achieve a perfect seal.
Key Benefits
- ✔ Optimizes piston ring & bore bedding
- ✔ High-grade virgin mineral base oils
- ✔ Supports full load runs for short bursts
- ✔ Safe for motorcycle wet clutch systems
- ✔ Protects highly stressed components
Technical Specs
| Viscosity Grade | SAE 30 |
| Oil Type | Pure Mineral |
| Flash Point | >200°C |
| Base Stock | Virgin Solvent Refined |
| Compatibility | Petrol & Diesel |
Application & Fitment Guide
| Engine Type | Condition | Vehicle Category |
|---|---|---|
| Petrol / Diesel Engines | Newly Rebuilt / New | Passenger Cars / Van |
| Motorcycle Engines | Break-in Period | Classic & Modern Bikes |
| Marine / Stationary | Post-Machining | Inboard / Generator |
Industry Cross Reference
| Millers Oils | CRO 10W-40 (Performance Alternative) |
| Castrol | Classic XL 30 (Mono-grade Base) |
| Penrite | Running-In Oil 15W-40 (Viscosity Var.) |
| Standard Spec | API SE/CC (Historical Equivalent) |
Questions & Answers
Is this oil suitable for permanent use?
No. This is a dedicated break-in fluid. It should be removed while the engine is warm after the recommended running-in period (typically 500 miles or 20-30 hours) and replaced with the manufacturer's standard service oil.
Can I use this in a motorcycle with a wet clutch?
Yes, this mineral-based SAE 30 formula is safe for use in motorcycle engines including those with wet clutch transmissions during the bedding-in phase.
Why use SAE 30 mineral instead of synthetic for a new engine?
Modern synthetic oils are designed to minimize friction to such a high degree that they can prevent the piston rings from wearing into the cylinder walls correctly (glazing the bores). This mineral oil allows just enough controlled contact for components to seat properly.
Note: Always consult your engine builder or specialist guidelines for specific break-in procedures as they can vary by engine type. Available at 4boats.co.uk.
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