Dodge Dart oil replacement
Can I use 5w30 synthetic in my 2013 Dodge Dart
that has 5w40 synthentic written on thee cap
No problem but you might see a little more oil consumption.
If it says 5w40 on the oil cap. why would you want to run anything else?
use 5w30 and your lifters will go flat after a week or two. Similar to lifter issues encountered on diesel engines. Stick with 5w40 and avoid a problem where no oil pressure leads to flat lifters and zero compression and fire