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  #1  
Old 06-19-2013, 10:23 PM
Dragonmaster13 Dragonmaster13 is offline
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Default 1/2 5w30 + 1/2 5w20

will I have any issues?
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Old 06-19-2013, 10:33 PM
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I wouldn't chance it...

but you'd have 5w-25
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Old 06-20-2013, 03:08 PM
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i have never had issues mixing oil similar in weights (10-30 & 10-40), but I have never delt with a eng like the 5.7 with MDS only older Chevy stuff.
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Old 06-20-2013, 03:11 PM
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it could potentially be an issue only because of MDS...needs the lighter oil for running on 4-cyl. doesn't like the heavier stuff.

a few guys turn MDS off and run 5w30
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Last edited by gonefishin776; 06-20-2013 at 03:14 PM.
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