I'm not completely against using a 50-grade the engine just seems to like the 40 a little better. That could very well be in my head though..
And, yep! Not tire-smoking fishtail launches up to max rpm, but rolling off the line and flooring it up through the gears. From a stomp in 3rd gear at 40 mph the tach gets to about 5200 in the blink of an eye and then starts to slow, though the car keeps pulling. I did the 'keep it easy' break-in on my last two 440s and they had less-than-stellar ring seal. The last engine pushed the dipstick up 3" and blew oil out the breather when I hammered it good; this time, I've not shown it much mercy and it's rewarded me with no hints of oil misting, dipstick stays home..
