I used to pull race six-seven situations a night.i dont have an oil cooler and my earlier oils lasted only 300miles max until eventually they grew to become drinking water like.this lasts 1.5k miles with my driving.the 20w50 which basically does not have the w..it's 2050. it acts similar to https://elevemotors.com/product/jdm-subaru-ej20-turbo-engine-for-sale/