I used to drag race six-7 instances a night.i dont have an oil cooler and my earlier oils lasted only 300miles max right until they turned drinking water like.this lasts one.5k miles with my driving.the 20w50 which actually does not have the w..it's 2050. it functions similar to a 50 https://elevemotors.com/product/jdm-nissan-sr20-turbo-engine-for-sale/