I'm new to Dodge and the 6.4L so please pardon my confusion on the oil change requirements.
If I understand this correctly (and please correct me if I'm wrong).....
FCA says, as long as your under the 36/36 warranty (and you want it to remain in effect) you must change your oil at least every 6 month or 6,000 miles, OR if the OLM says your at 100% use. This would obviously have to happen with an oil that meets FCA specs for this engine. I know there are several as already mentioned. Oil filters specs are less clear and perhaps not as important.
You can obviously change it sooner if you like with no adverse affect to your engine warranty while it is in effect.
After the 36/36 warranty period, we should change it according to the OLM.
Or, does the 6 month/6,000 mile recommendation still apply as well?
Do I have this right or am I still confused.
I don't understand the 6 month requirement. Especially when we're supposed to use such 'high quality, synthetic' oil'. What happens to it after 6 months? I don't feel that most owners of this engine drive it like Miss Daisy so it is likely considered 'severe use' but I don't understand the drop dead date. This is not curdled milk. As a group I think we all take care of our equipment better than the average car owner.
Thoughts?
DeWFPo
The 6 month oil change is to catch those owners who do not drive 6K miles in 6 months. It is not so much the specific number of miles it is the implied usage the car receives. 6K miles in 6 months works out to around 33 miles/day. This number suggests the car gets driven enough to heat the engine and oil up thoroughly to remove much if not all the water that the oil accumulates. (From combustion.)
As an aside water in the oil affects the oil's ability to protect the engine. If the engine is not operated in such a way to get the oil hot enough to boil out of the oil the only other way the water can be removed is to drain the oil -- hot.
Less than 6K miles in 6 months suggests the car does not get driven enough to heat the engine and oil up thoroughly.
Dodge can't -- and I don't blame it -- come out with a sliding scale of oil changes based on the number of miles driven over time that covers all the possible scenarios. The majority of Dodge customers are not owners who buy a car then let it sit unused for 6 months. If you are one that lets the car sit for 6 months with nearly zero miles of use or drive it to 5999 miles in 6 months then the 6 month oil change requirement is there to ensure at least the oil gets changed regularly.
My Hellcat is the first car I have owned that I have had to change the oil based on time not miles. Previous vehicles got driven enough to always get an oil change triggerd on miles driven not time passed.
But the Hellcat has had one oil change based on time. In this case -- a couple of years ago -- I put around only 3K miles on the car in 6 months. I am about to have the oil changed early -- in less than 6 months and with less than 5K miles (I use 5K miles rather than 6K miles) -- since its last oil change back in July. It is cooler (cold?) now where I live and I prefer to have fresh oil in the engine at the start of "winter". And come spring regardless of the miles I will have the oil changed again because I like to get rid of the "winter" oil and start the driving "season" with fresh oil in the engine.