The vehicle manufacturer of Kash Mazda requires the use of 0w-20 synthetic oil for maintenance. 0w-20 oil viscosity, there is no problem with ordinary driving, as you said, it is violent driving. For floor oil, the viscosity of the oil is slightly lower. 0w-20 engine oil has low viscosity oil film strength, and low viscosity engine oil is mainly used to reduce fuel consumption, without high performance power. The engine oil with viscosity of 20 has a little insufficient power at high engine speed, and the noise will increase obviously, so the engine oil with viscosity of 20 is not suitable for your operation mode. According to your driving habits, it is recommended to use the all-synthetic engine oil engine oil certification standard GF-5/GF-4 in accordance with ILSAC. The viscosity of engine oil can also be 0w-30/5w-30. If you like engine oil with better power, you can try the following brands: American Mobil 1, Shengpai, Anceaux Signature Edition, Breakthrough, German striker, Korean PAO 1, and Japanese Gks. These brands are all synthetic oils made of PAO base oil, which have good dynamic performance and long service life, and can be maintained once a year or 10000 kg.