Samuel Harley Posted August 1, 2016 Report Share Posted August 1, 2016 The owner's manual says to use 5W-30; the filler cap say 5W-20. Which is correct? Quote Link to comment Share on other sites More sharing options...
WWWPerfA_ZN0W Posted August 1, 2016 Report Share Posted August 1, 2016 If you have an Ecoboost engine (2.0 or 2.7) use 5W30, otherwise use 5W20. The oil filler cap rumps whatever the manual says, so when in doubt ... But, there's always the possibility of incorrect cap from factory, I think very very very small tho. Quote Link to comment Share on other sites More sharing options...
akirby Posted August 1, 2016 Report Share Posted August 1, 2016 Should be 5W-20 for the 3.7L, 5W-30 for the 2.7LEB. You probably have the 3.7L and looked at the wrong entry in the owner's manual. Quote Link to comment Share on other sites More sharing options...
WingNut Posted August 1, 2016 Report Share Posted August 1, 2016 Make sure you are looking at the right engine spec. in the owners manual. There is one manual for all 3 engine options so some sections will reference which engine it applies to. 1 Quote Link to comment Share on other sites More sharing options...
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