I have done some research and fact finding on this issue. Based on your GVW and horsepower rating of the V6 engine and the average relative humidity of your area( brooklyn ny). I also factored in the use of 89 octane as recommended per the manual and the average weight of two 20-40 year old adult passengers. This was only a guess for said equation. Also reaserched the viscosity of several popular winshield washer fluid brands. Be aware this was only summer fluid, not the thicker de-icer, so the might effect the outcome during the winter months, so again your performace might be different in the winter. I also used the GVW with a half a tank of gas, probably average for most. My equation shows that the resivour should be EXACTLY 4.65 Inches from the top of the filler cap. This finding is all relative to my best guesses for your situation. And one last thing, i did not do any of this. Just fill it all the way up. Thanks for reading,and yes i was bored
You have to redo it - I use 87 octane as recommended for V6 engine.
You need to get a long hose to siphon out whatever is remaining in the tank, then flush it out to make sure you get all the "gunk" that collects at the bottom. I personally recommend drilling 3-4 holes in the bottom to ensure complete drainage. Once you confirm all the gunk has been completely drained, you need to plug the tank (wouldnt want the new fluid to leak out) . The recommended plug is Mopar P/N A20739, I personally add a couple 2-3 layers of duct tape to make sure everything is sealed good.
Once done, pour in 1 gallon of purple power windshield washer fluid to ensure complete and effective cleaning.