Going full synthetic (I want to good/bad)

Discussion in 'The Garage' started by JerZeyStangz, Sep 9, 2006.

  1. JerZeyStangz

    JerZeyStangz Well-Known Member

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    I am running Mobil 1 10w30 right now and im gonna be do for an oil change in a few months so i want to know...if i got 5w30 will i be ok? the car has 68k on it right now...so tell me the good and bads guys....

    Nate
     
  2. Dalamar

    Dalamar Legend Retired Staff SN95 Supporter

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    Might run a little bit hotter, otherwise it will be fine :)
     
  3. JerZeyStangz

    JerZeyStangz Well-Known Member

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    I never knew the oil can make the car run hotter, meaning will i see a difference on temp guage on dash or like if i open the hood i will feel more heat?
     
  4. Matt94GT

    Matt94GT Legend Retired Staff SN95 Supporter

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    i know all I have ever run in my mustangs was 10w30, on a nice rebuilt I might run 5w.
     
  5. wytstang

    wytstang Well-Known Member

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    5w30 will be fine and you won't run hotter there is no reason for it.
     
  6. 97vertstang

    97vertstang Well-Known Member

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    if ur already running 10w30, just keep using.
     
  7. Lightning Struck

    Lightning Struck Legend

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    never heard that before ???
     
  8. Dalamar

    Dalamar Legend Retired Staff SN95 Supporter

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    My bad my bad.
    My motor builder was telling me about running 5W vs 10.
    I thought he said it could get hotter on worn motors... I asked him again. Nope.
    Said it might burn some oil since it's thinner.

    Sorry for the confusion.
     
  9. FaStStAnG5-0

    FaStStAnG5-0 New Member

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    all i've ever used in my stang since i bought it was 10w-30 royal purple & k&n oil filters...

    ok now commence with the high roller comments..but when it comes to my engine a little extra cash at oil change time has never hurt ya know! :thumb:
     
  10. Lightning Struck

    Lightning Struck Legend

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    :lol: :lol: :lol: :lol:
     
  11. drifts14x

    drifts14x Member

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    If you want to make the switch, do a synthetic blend oil change first, this will help condition the seals for a full synthetic. Older engines tend to leak if you just dump Synthetic oil in them. Some of the Fords call for 5w-20, but the early 4.6 and late 5.0's call for 5w-30. Lighter weight oil reduces drag on the engine resulting in increased fuel efficiency and performance. Just a thought. I run Pennzoil Platinum 5w-20 in my 1995 5.0 GT and it works great. No leaks, no decrease in fuel efficiency, no excess heat.
     
  12. riored96gt

    riored96gt Active Member

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    Me too!! ...and absolutely not a rich guy!
     
  13. killagt

    killagt Member

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    hell i ran 15/50 mobil 1 with motorcraft filter, no complaint yet for the summer :dancing6:
     
  14. Downshift

    Downshift Well-Known Member

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    The 94-95 Mustangs take 10w30. Are you talking about later as in explorers and such?
     
  15. i_love_my_stang

    i_love_my_stang Active Member

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    i use 10-30 just a regular oil, when i used 5-30 my car ran like shit, worse gas milage and burned it faster, also it would leak and burn synthetic, im just gonna stay with 10-30 i wouldnt ever try 5-30 again
     
  16. Fastfox400

    Fastfox400 New Member

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    I have always used 10w30 on everything except where the manufacturer has called for something else. On my 97 F150 i use Ford 5w20 Synthetic blend because thats what it calls for. Now the cobra i use 10w30 Royal purple With a Mobil 1 filter. Yes i agree with spending more money on oil as is it has a important job. You get what you pay for. Now on a new engine depending on how tight the clearences are i would start with 5w30 dino ooil for the breakin period an the first 500 miles, then i would switch to a 5w30 synthetic blend for the next 3k miles then switch over to full synthetic 10w30 depening on what climate you thing in.
     
  17. zero_chance

    zero_chance New Member

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    Oil is dependant on climate. The 5w and 10w are in relation to how the oil acts in very cold weather. I live in the northeast and 5w 30 is the norm up here. Though Ford issued their oil change job aids years ago stating the 5 liter can use 5w 20. I have the hard copy at my dealership. I still run 5w 30 but Ive been running Royal Purple for some time now. Switching to a full synthetic can sometimes make seals and gaskets leak as the oil has a natural solvency that cleans up buildup and can expose hidden problems like a worn seal. Check out Royal Purples website for more info and lots of tests that prove thier claims.