I am going to do a fluid and filter change on my 4R100. Was told to use MOIBIUL1 seeing I plow with the truck. Mobil 1 is not certified by FPRD for MERCON V but is states it meets it. Is it safe to use or should I use MOTORCRAT MERCON V or Valvoline ATF? And where is the cheapest place to buy? Tried looking it up but to much technical BS to rear I want the short and sweet layman's terms. DO NOT want to damage my trans. Thank you