SHOULD I USE CAR OIL FOR MOTORBIKES AND VICE PASTE?

Car oil should not be used for motorbikes and vice versa, because they have different technical requirements. Here are the specific reasons:

1. Differences in engine design:

– Motorcycles: Motorcycle engines often operate at higher rpm than cars, requiring oil with good lubrication and high heat resistance in harsh conditions. In addition, manual transmission oil lubricates the engine, gearbox and clutch (especially with wet clutches in manual transmission vehicles).

– **Cars**: Car engines often have lower rpm, separate lubrication systems for the engine and gearbox. Car oil is optimized for large engines, does not require special friction properties like motorbike oil.

2. Friction requirements:

– Wet clutch motorbikes (manual transmission vehicles): Oil needs to have suitable friction for the clutch to operate smoothly, without slipping. Car oils often contain additives that reduce friction, which can cause clutch slippage, reduce performance or damage the clutch.

– Dry clutch motorcycles (scooters): No need to worry about the clutch, but the oil still has to withstand high rpm and extreme temperatures of small engines.

– Cars: Car oils do not require special friction properties for the clutch, so they are not suitable for wet clutch vehicles.

3. Additives and viscosity:

– Motorcycle oils often have special additives (such as ATMOIL fully synthetic SN10W40 JASO MA/MA2) to ensure performance for wet clutches and high rpm. Car oils have additives that focus on cleaning large engines and providing long-term protection, but may not be suitable for motorcycle engines. – The viscosity of car oil (such as 5W-30, 10W-40) may be too low for the requirements of motorbikes (usually 10W-40, 20W-50), causing wear or overload of the engine.

4. Consequences of incorrect use:

– Car oil for motorbikes: Can cause clutch slippage (manual transmission), overheating, engine wear, or reduced engine life.

– Motorcycle oil for cars: May not be able to clean and protect the car engine for a long time, leading to dirt accumulation or engine failure.

**Reality about motorbikes**:

– **Dry clutch scooters**: The oil does not need to meet the friction requirements of the clutch, so it can be more flexible, but still needs to meet the manufacturer’s specifications (usually JASO MB).

– **Wet clutch**:

JASO MA/MA2 standard oil is required to ensure the clutch works well and does not slip.