I used to drag race six-seven periods an evening.i dont have an oil cooler and my past oils lasted only 300miles max right until they turned h2o like.this lasts one.5k miles with my driving.the 20w50 which truly doesn't have the w..it is 2050. it functions like a 50 when its https://elevemotors.com/product/jdm-nissan-sr20-turbo-engine-for-sale/