The oil intended for the completion of two-stroke karts’ mixture (find out in the following article How to prepare the mixture), regardless of whether they are vegetable, semi-synthetic or synthetic, are products with specific components that guarantee you very high lubrication performance and combustion time. Kart engines (100 cc and 125 cc, both single speed and shifter), unlike other 2-stroke racing engines apparently stressed in the same way as motorcycles, are subjected to non-stop enormous mechanical stresses and very high levels of rpms. All this requires the use of a specific oil to be manually mixed into the fuel in a percentage dictated by the engine manufacturer. In the same way, some excellent oil intended for karting proves to be ineffective when used with non-kart engines. If we used kart oil for a lawn mower engine mixture, after cutting the lawn I do not think we would like the smell of smoking castor oil and what is created during the combustion phase, a complete disaster!