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opinions on which oil, Mobil1 0w-40 or Valvoline Synpower 5w-40?

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Old 04-01-2003, 02:11 PM
  #21  
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Default That's because the 0w-40 is thicker than 0w-30...
I only experienced valve chatter at startup when I first used M1 0w-30 in my car, and that was the old TriSyn formula which did not contain moly. But when I started using M1 SuperSyn, the moly coated up everything nicely, and no valve chatter ever since.... with 5w or 0w oil.
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Old 04-01-2003, 03:40 PM
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Mmm, Moly.
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Old 04-01-2003, 03:43 PM
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Default Says on the 0w-40 bottle "Fuel Efficientcy Formula", 5w-30 says New Car,10w-30 says Multi Vechicle
and 15-50 says Performance or something like that.
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Old 04-01-2003, 03:48 PM
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Default The heavier weights rob engine power. Best is to use the lightest to do the job. If someone wants M1
I say get the 5w-30. I know that is not ACEA yet, but it's my pick.
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