I used to tug race 6-7 times an evening.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 one.5k miles with my driving.the 20w50 which basically doesn't have the w..it can be 2050. it functions like https://elevemotors.com/product/jdm-engine-4age-blacktop-for-sale/