Smokin'Red35th

I have 90,000 miles on it. Oil is changed every 7k-7.5k miles. Normal driving, I save the spirited driving for the Mustang. We've towed a light boat (<2500lbs) with it a time or two, plenty of hills around here to put a good load on the engine, and it gets mixed city/highway driving. I checked back through my MX records, and the first few oil changes were done at the dealership, so I retract my previous statement of using Mobil1 for the first oilchange. I havent noticed any coolant in the oil, and I only noticed the blue smoke AFTER changing the oil this week, so the oil pan was full with 5.5qts This car doesnt get babied, it gets used with plenty of hard driving. the gas pedal has seen the floor on a few occasions when needed. As mentioned above (sorry for not putting it in the first post) its got 90,000 miles on it. Also, I dont go by the dipstick. The manual says 5.5 qts so thats what I use. I know I have a qt less because I pour my used oil back in the empty Mobil1 5qt oil containers for easy disposal. So using the window on the side of the container, with the graduations on it, I can tell that I get less out than I put in. I did get a kick out of that dipstick thread though... When I get a chance, i'm going to start by pulling the plugs for evidence of oil consumption.

Ok I've heard that before about synthetic oil, for some reason I thought motorcraft was full syn. apparently I was wrong. I believe I waited till 7500 miles to change the oil though. I'll look into a compression test, but aside from that, anything else I should check?

I have been using Mobil 1 since the first oilchange. why would the brand of oil have anything to do with the rings seating properly if the oil is the same weight and both synthetic?

Mobil1 5w20 per the manual. there are no leaks. I make sure to look around evertime I put it on the lift to change the oil

After changing the oil, I notice there is about 1qt less than I put in. Also notice a small ammount of blue smoke in the exhaust under accelleration. What do I need to start looking at?

Anybody know the torque specs for the spark plugs? Not that it should matter, but its for a 2008 Edge SEL Thanks!