Originally Posted By: Sonic
I have an '06 town & country with the 3.8 liter and it does the exact same thing. A full qt is added by the time I hit 3000 miles. Been using QS as well, 0w20 or 5w20 (synthetic). I'm gonna use high mileage oil next to see if it makes a difference on the consumption, it only has 55000 miles on it. I too have used 5w30 in it or sometimes mix 5w20 and 5w30 when I have partials sitting around.
I too have a 2006 T&C with the 3.8L and it goes through a quart (depending on the season) over the course of a 5k miles OCI. I was going through a quart over 3K miles, but I switched to High Mileage oils and it slowed to a quart over 5k miles (again, depending on the season. Sometimes it is less).
It has 108k miles on it. I purchased it used at 90k miles. I switched it to Mobil 1 0W-20 and did two runs of that. During that run, I added MMO for the make-up oil and to help M1 clean out whatever the PO left in there. After I noticed the consumption issue, I then switched it to Quaker State High Mileage 5w20 at 100k and it almost stopped. It fell from the top hash to the bottom hash during the 5k OCI, which is about half a quart. At 105k, I switched to NxtGen High Mileage 5W-20 (I got a good deal on it and QS came out very black and burnt smelling. I wasn’t very font of that.) and so far, at just under 109k, I have added 3/4 of a quart of Pennzoil Ultra 5W-20. At 110k, I’m planning on running Motocraft 5W-20. I kinda want to see if the High Mileage is really helping. If consumption increases, I’ll go back to a High Mileage oil and stick to it.
This vehicle was taken care of with regular oil changes conventional before I got it, so I don’t think it is a neglect issue. The more I read about it, the more I feel it is a common issue with this motor. To be honest, if High Mileage oil is keeping it to 3/4 to 1 quart per 5k miles, I’m good with that.