I used to tug race 6-7 instances a night.i dont have an oil cooler and my past oils lasted only 300miles max until they grew to become water like.this lasts 1.5k miles with my driving.the 20w50 which in fact doesn't have the w..it's 2050. it functions just like a 50 https://tysonokkrx.thebindingwiki.com/7530958/facts_about_subaru_wrx_sti_for_sale_revealed