Consider this:

[rapideo]

When a new engine is broken in slowly, no fast driving or jackrabbit starts, it seems that engine never breaks in properly.
It uses oil for a long time and never has the pep it should have.
in particular, I have noticed this on a 90 Ford 351, and more recently on a 2000 Chev 350. Both very sluggish. Or is it just my imagination?

[towtrucks]

Supposedly....engines no longer require a break in period. Besides, who does it anymore? Right off the dealership lot onto the highway. Next time you see a brand new car (paper licence plate), watch how they drive that new car.

[danny]

i was told years ago to drive a new engine as you would if it wasn't new

[mailman]

Every new car I have ever bought, starting in 1970, I have driven like this. I usually drive for first 1,000 miles at varying speeds. I'll drive for a few miles at say 60 then 70 then 60 and so on. Intermitantly I'll spurt to 80 or so. After this 1,000 miles I drive normal. I do like to get where I'm going so I tend to take off fairly quickly. I have never had a car to burn oil, and never had a major engine problem. In fact in 1970 I bought a 1970 Ford Maverick with 250 inline 6. My mother bought one with same engine. Her car used oil after about 10,000 miles and never quit, even though I did take it out and run the crap out of it. I have no scientific data to back up this procedure, but it works for me every time. Manufactures say no breakin necessary, but I still do the same thing. If it's not broke don't fix it!