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2010 Challenger 6M- Brilliant Black, 426 stroker, Hellcat rear cradle, ZF 3.90 diff, DSS 1 piece
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Discussion Starter #1
I am having a difficult time locating 5w-20 full synthetic.
Would 0w-40 offer the same protection?
This is on a non-MDS 5.7
The wife's Dart takes 0w-20 for increased mpg, I don't see why dodge wants to run such thin oil in their engines.
 

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What's Old is New Again!
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Both Advance Auto and AutoZone carry various brands of Full Synthetic in that weight. I work at Advance and we carry Valvoline Full Syn, Castrol Edge, Pennzoil Platinum, Quaker State Full Synthetic, Royal Purple and our own Advance Auto brand in that 5W-20 weight. I would not use anything other than 5W-20 in a 5.7.
 

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2010 Challenger 6M- Brilliant Black, 426 stroker, Hellcat rear cradle, ZF 3.90 diff, DSS 1 piece
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Discussion Starter #3
I was thinking that perhaps the 0w40 is slightly thicker, and might provide better protection during the Texas heat.
 

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2010 Challenger 6M- Brilliant Black, 426 stroker, Hellcat rear cradle, ZF 3.90 diff, DSS 1 piece
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Discussion Starter #5

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Also - some of the oil galleys and passages are very fine and a heavier weight oil may not penetrate or it might be viscous enough to actually clog a small passage.
 

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Discussion Starter #9

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