2T versus 4T Engine Oil

Motorcycles are exhilarating and practical modes of transport. Motorcycle technologies have evolved over the decades and so have their engines. If you were to purchase a motorbike now you would have the choice between a 2 stroke and 4 stroke engine. Both engines have respective purposes and advantages to suit its intention. Thanks to these types of engines, engine oils for both 2T and 4T have been formulated so these engines perform at their best. Let’s understand the difference.


2T oils are added into the fuel where else 4T oils are added separately as you would a car engine oil. 2T oil mixes with the fuel and therefore burns and passes through the exhaust. As it flows from the fuel tank, it lubricates components in the engine and exists accordingly. 2T engine oil carries properties that allow it to burn with the fuel mixture. It therefore has a lower burning point than 4T engine oil.


4T engine oil on the other hand works by lubricating the crankcase of the engine much like a car engine. It lubricates the engine from within and will require regular services according to the appropriate interval changes. Key differences between 2T and 4T oils are flashpoints, viscosity and ash content. 2T oil has a lower flashpoint as it needs to burn with the fuel, while 4T oil withstands high temperatures and is formulated to perform lubrication at high performance levels. 4T oil has higher viscosity as well as it needs to flow and lubricate from the crankcase. Ash content refers to the amount of additives in the oil and 4T has more additives to protect the engine from wear and tear.


2T and 4T engine oils are not interchangeable due to the different engine construction it is designed for. Interchanging the fluids will be detrimental to the engine. 4T engines are generally found on sports and superbikes with larger capacity engines. Idemitsu offers a wide range of 4T engine oils that not only enhance performance but also ensure maximum protection for these high powered motorcycles.