Synthetic or Conventional oil at 57k?

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03-17-2007, 06:15 PM

#11

03GMC

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The cap says 5-30 though. Whats the deal with some guys coming to my shop using 0-30 Amsoil?

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03-17-2007, 08:41 PM

#12

SnakeOiler

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Some people don't like to follow directions

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03-17-2007, 08:45 PM

#13

nightrunner

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i think the reccommended 5w30 is for the cooler climates

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03-17-2007, 10:16 PM

#14

99LoweredSierra

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10w30 is good for summer on older engines also

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