Premium vs fleet grade. The stratapor is a synthetic fabric that filters smaller particals with out restricting oil flow. The fleet grade is also a non directional fiber material but does not flow as well so does not filter as small ( older technology ). Fleet trucks are usually traded or sold every 3 to 5 yrs so let the next guy worry about it. Most fleets do not use premium oil either. Do you run the cheapest gypo unbranded gas in the other halfs car???