I used to pull race 6-7 situations a night.i dont have an oil cooler and my past oils lasted only 300miles max right until they turned h2o like.this lasts one.5k miles with my driving.the 20w50 which actually doesn't have the w..it truly is 2050. it acts similar to a fifty https://elevemotors.com/product/jdm-mitsubishi-outlander-4b12-engine-for-sale/