I have a 1994 1.9L escort with nearly 170000 miles on it. The engine after sitting over night wil clatter when started as if you had done an oil change. If it has been driven through out the day it will not do this. It only happens it the car sits for several hours. I have tried synthetic oils and several oil filters. I am now using the best combo that I have found so far, I am using Havoline conventional engine oil that I bought from Sam's Club and a Fram high mileage oil filter. The engine is no longer using oil (1 quart per oil change) but still has the "dry start" clatter. Do you have any ideas about this? I have good oil preasure so that is not an issue and I change my oil every 3 months or 3000 miles whichever is reach first.