I used to pull race 6-seven situations an evening.i dont have an oil cooler and my former oils lasted only 300miles max until finally they became h2o like.this lasts 1.5k miles with my driving.the 20w50 which basically doesn't have the w..it really is 2050. it functions just like a fifty https://israelanbnt.wikibyby.com/848485/what_does_13b_renesis_engine_for_sale_mean