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  1. W

    Synthetic?

    If standard oil is made from "crude", what is synthetic oil made from?
  2. W

    Whats it all mean?

    OK, im new to this forum, so forgive me. im sure this questions been asked many times before, and ive asked it many times without an explaination. What is the meaning of the #'s and the "W" in the oils. ie: 5W20, 20W50, 75W90, 75W145, and so on? I know the second # is the oils weight, but then...
  3. W

    Ford's blowing spark plug problem

    Well, unfortunatly, i am 1 of the few that have blown a plug out of the head. Local dealer couldnt tell me why it happened. Luckily it was covered under my extended warrenty
  4. W

    Whats it all mean?

    thats the opposite of what the others were saying, or am i totally confused now? 5 would be thinner than 20, since gear oil is 90
  5. W

    Changing rear differential fluid on F250

    Royal Purple & Redline both make a full synthetic 75w145 and are available at Jegs and Summit Racing
  6. W

    Whats it all mean?

    so let me see if i got this right. in say a 5w20, at operating temp its going to thin to 5, and at a set cold temp its going to be 20?
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