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  1. #1
    SVT God SRT-4 Turbo 7's Avatar
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    What weight oil for a 2003 Mach 1

    I am going to change the oil for the first time in my 2003 Mach 1. I purchased an OEM oil filter and was going to use Royal Purple.

    What weight oil should I purchase?

    Also some people have said 5 quarts while I thought it was 6. Didn't 2002 + models require 6 quarts of oil.

    Thanks
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  2. #2
    SVT God SRT-4 Turbo 7's Avatar
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    I went ahead and purchased 6 quarts of Royal Purple 5w-20

  3. #3
    Bingo. wurd2's Avatar
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    I use a Motorcraft FL-820S filter and close to 7 quarts of Royal Purple 5W20 basic (as in non-racing) oil. I have been really curious about the negative material I have read about Royal Purple, but I just do not know what to believe. I have been meaning to switch to Amsoil because I have yet to read anything negative about their oil. At the end of the day though, frequent oil changes is still more important than brand names.

    I also use one of these on my filter: FilterMAG!

    Last edited by wurd2; 07-04-2008 at 12:29 PM.
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  4. #4
    Bingo. wurd2's Avatar
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    I would recommend at least 6.5 quarts!

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  5. #5
    Bingo. wurd2's Avatar
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    Oh yeah. Congratulations on your Mach1. If it is still near stock, I bet it is a lot slower than your SRT-4, haha. For some increased performance, I recommend 4.30's, Kooks long tubes, and a good tune.


  6. #6
    The New and Improved L.L. LIGHTNING LARRY's Avatar
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    Quote Originally Posted by SRT-4 Turbo 7 View Post
    I am going to change the oil for the first time in my 2003 Mach 1. I purchased an OEM oil filter and was going to use Royal Purple.

    What weight oil should I purchase?

    Also some people have said 5 quarts while I thought it was 6. Didn't 2002 + models require 6 quarts of oil.

    Thanks

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  7. #7
    Crazy SVT Poster Mach Boy's Avatar
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    5w 20

  8. #8
    SVT God SRT-4 Turbo 7's Avatar
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    Quote Originally Posted by LIGHTNING LARRY View Post
    MOVED

    Sorry Sir.

  9. #9
    Who said 5 quarts? Are they mentally handicap?

    There is some controversy as to how much you should run, but that is if you should run more than what is called for by Ford (6 quarts). I put in 6.5, 5w20.

    Also remember to let the car sit before checking the oil if the engine has been running. And you should know the dipsticks are known to not be accurate, don't add oil just based on what the dipstick says being full. It takes 7 quarts to reach the full mark in my car.
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  10. #10
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    I use 5w20 CastrolSyntech,there was this oil test I saw on another thread and CastrolSyntech outperformed RoyalPurple.It showed the wear on a lifter once the oil ran dry.I forget what was the best, I think Lucas oil was.Too expensive for me.Walmart has Castrol.so I went with that and a Motorcraft 820-s filter.My engine takes between 6.5-7 qts of oil.Just my opinion.

  11. #11
    Centrifuged speedofsound's Avatar
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    This is what I have read and been told:
    5w20 N/A
    5w30 boosted

    I used to put in 6qt's when I had my stock pan, which would bring it to the middle of the add/fill lines. Now that I have my Canton pan, that is a whole new controversy!

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  12. #12
    Crazy SVT Poster
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    5w20 and 6.5 quarts

  13. #13
    SVT God SRT-4 Turbo 7's Avatar
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    thanks guys she took 6.5 quarts.

  14. #14
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    Quote Originally Posted by wurd2 View Post
    I use a Motorcraft FL-820S filter and close to 7 quarts of Royal Purple 5W20 basic (as in non-racing) oil. I have been really curious about the negative material I have read about Royal Purple, but I just do not know what to believe. I have been meaning to switch to Amsoil because I have yet to read anything negative about their oil. At the end of the day though, frequent oil changes is still more important than brand names.

    I also use one of these on my filter: FilterMAG!

    AMSOIL rocks!!!...I also have heard some neg hype about RP but have seen many comparo's saying RP is the best you can get for the $.
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  15. #15
    Rookie SVT Poster Mach1Man04's Avatar
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    Quote Originally Posted by wurd2 View Post
    I would recommend at least 6.5 quarts!

    .
    i agree
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  16. #16
    SVT God BM1's Avatar
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    I keep it very simple and run Motorcraft Full Synthetic 5w20 and a Motorcraft oil filter. I've had no problems and my car is Vortech blown making 500+ HP.

  17. #17
    300+ club Socal Mach's Avatar
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    Whoever told you 5 qts needs to be shot. Twice!!

    wurd2 and speedofsound your cars look freaking awesome
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  18. #18
    If i have 5w-30 6 quarts can i add half of 5-20?
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