Don't crucify my here....the truck seems to developing the dreaded head gasket oil leak that is highly common among F150's built during that time. Climbed under it and can see a sheen, on some places, but not covering the entire engine or starter, another tell tale sign. It's starting to slowly drip. Somehow the oil has reached its way to the AC compressor and dripping off of it. Nothing major, like a drip now and then, but it never has done that before so I'm thinking its a future omen. Truck is old, won't get hardly anything if I trade it in and has about 94K on it. Not worth having it analyzed and then looking at replacing both heads for a couple of grand. No dipstick difference between oil changes. Just going to live with it. Question, seen so many adds for Lucas/STP "oil treatments". Would it be worth trying one of those to see if the leak slows down? Like many of you, I've never believed in additives, but with the age of this truck and other problems that are starting to emerge, I figure it may be worth a shot. Truck has been on an exclusive diet of M1 EP 5W-30 with MC filters, OCI has been once every two years...it may average 4K miles a year so I ain't throwing away good oil and it's parked inside. I'm wondering maybe switching to a HM oil would make a difference. It doesn't lose coolant or anything like that, just seeping a little oil.