I used to tug race 6-seven moments a night.i dont have an oil cooler and my previous oils lasted only 300miles max until they grew to become drinking water like.this lasts one.5k miles with my driving.the 20w50 which in fact doesn't have the w..it really is 2050. it acts like https://elevemotors.com/product/jdm-nissan-sr20-turbo-engine-for-sale/