I used to pull race 6-7 occasions a night.i dont have an oil cooler and my prior oils lasted only 300miles max until finally they grew to become h2o like.this lasts 1.5k miles with my driving.the 20w50 which really does not have the w..it's 2050. it functions like a 50 https://michaeln839jfq1.blog-kids.com/profile