I have ran manufacturers recommended oil all my life up and until this week. I got use to sounding like a truck at 1500 rpms as well as noises on first start as all searches points to normal. Lots of the ones that brought to the dealer had tons of work done before being told normal so I expected nothing to change. I ran 5w20 for 15k either synthetic or a blend with no difference. I went with 5w30 this time due to a sale knowing not recommended but ok so I expected if anything fuel mileage would take a hit although previous years fuel mileage EPA rating was same for both grades so don't know what changed as all parts interchangeable. Anyhow all was the same for 20 miles then I can't explain as it got smoother and quieter. Fast forward to today and the shift points are similar to ECO button pressed but I can only tell if it shifts by looking at tach so that doesn't make sense. Noise is almost completely gone both at first start as well as 1500 rpm with 50 miles driven. Could this be engine is built with 30 grade in mind but FCA went with 5w20 for Cafe although EPA Fuel Mileage is the same?
2018 Grand Caravan
2018 Grand Caravan