My 2016 Grand Caravan, 109k miles, 3.6 engine, is experiencing lifter tick. I've owned the vehicle since 28k miles. Oil changes were synthetic oil changed per OLM; which tripped around 10k miles. I've read that earlier iterations of the 3.6 had lifter issues but this was supposed to have been rectified by redesigned heads. Dealership cost is going to be around $1000 whether I replace one lifter or all (mostly labor). It has a fresh oil change and I am running Seafoam. Is this a common problem with these engines? Is the Seafoam likely to help? Can I let the problem go and replace later if the problem persists? My next oil change I will add Liquimoly Lifter Additive.