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Old 05-17-2009, 03:33 PM   #1
mikemrq
Default Oil viscosity

My 06 Mustang GT is in the shop getting some work done. I would like to pick up a case of Royal Purple after work but I can't remember what viscosity oil I need. Can anyone here help me out?
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Old 05-18-2009, 12:08 AM   #2
Leonide
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usually either 5W-40 or 10W-40. i am running 5W in my mustang.
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Old 05-18-2009, 07:41 AM   #3
bassman97
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Stick w/ 5W20. The VCT system in your car is designed for that viscosity.

Also, I would never run something as thick as 5W40 or even 10W40 in my car, as it will not only kill mileage but hinder the flow of oil.
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Old 05-18-2009, 08:47 AM   #4
r3dn3ck
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w00t to that. 5w-20 on stock bottom ends.
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Old 05-18-2009, 10:30 AM   #5
spike_africa
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Checkout the new Mobil1 0w20 oil, its supposed to give a nice boost in fuel economy and costs the same as regular Mobil1.
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Old 05-18-2009, 10:44 AM   #6
Switch
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Quote:
Originally Posted by spike_africa View Post
Checkout the new Mobil1 0w20 oil, its supposed to give a nice boost in fuel economy and costs the same as regular Mobil1.
That's pretty interesting. It also says its safe to use on cars designed to run 5w-20 (which is us).
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Old 05-18-2009, 10:48 AM   #7
spike_africa
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Yeah that's what its for. They say the same protection and better mileage and they have a calculator to see how much you could save. Mine was something like $124 a year with only swapping to that oil. If I had known about it before I changed my oil last week I would of gone with that over regular Mobil1.
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Old 05-18-2009, 10:53 AM   #8
Switch
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Originally Posted by spike_africa View Post
Yeah that's what its for. They say the same protection and better mileage and they have a calculator to see how much you could save. Mine was something like $124 a year with only swapping to that oil. If I had known about it before I changed my oil last week I would of gone with that over regular Mobil1.
Haha I know what you mean. I just changed my oil two weeks ago. Next time I'll have to try it out.
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Old 05-18-2009, 10:55 AM   #9
spike_africa
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If the weather holds out, I might change mine early after I toss my bottom end all over the track on Wednesday lol.
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Old 05-18-2009, 10:08 PM   #10
Leonide
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Quote:
Originally Posted by bassman97 View Post
Stick w/ 5W20. The VCT system in your car is designed for that viscosity.

Also, I would never run something as thick as 5W40 or even 10W40 in my car, as it will not only kill mileage but hinder the flow of oil.

LOL thank you.. i ment W20.... not 40....
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  • Ram Air intake/Cervini ram air hood
  • SCT Xcalibrator 3 Programmer
  • Tokico shocks/struts and lowering springs
  • Hurst Short Throw Shifter
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Old 05-18-2009, 10:08 PM
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