I used to tug race six-7 situations an evening.i dont have an oil cooler and my former oils lasted only 300miles max until they grew to become h2o like.this lasts one.5k miles with my driving.the 20w50 which essentially does not have the w..it's 2050. it functions similar to a fifty https://elevemotors.com/product/jdm-nissan-sr20-turbo-engine-for-sale/