i accustomed to drag race 6-seven instances an evening.i dont have an oil cooler and my past oils lasted only 300miles max till they became h2o like.this lasts 1.5k miles with my driving.the 20w50 which essentially doesn't have the w..it truly is 2050. it functions like a 50 when its very hot but it surely doesnt have a big viscocity adjust at that