Possible to see visual evidence of car breaking in?
Everyone will probably think I'm nuts after reading this but I can't fight off the curiousity enough not to ask. So here it is, I'm 99.9% sure that the RPM to MPH relationship has changed in my car since I've had it/been driving it.
Day I picked it up (w/ 3 miles on it): 60 mph in 6th gear = 2,000 rpms
Yesterday (w/ 350 miles on it): 60 mph in 6th gear = 1,800 rpms
*it has been a gradual change, not 2000 then 1800 overnight or anything like that
So like I asked in the title of the thread, is it possible that this is evidence of the car breaking in or am I just nuts? My off-the-wall/not backed by anything concrete theory is that the rings are seating and the engine is becoming more effcient so it no longer needs 2,000 rpms to achieve 60 mph in 6th gear, it only needs 1,800 rpms to do it now. But like I said, this theory isn't backed by anything but my uneducated-in-engine-dynamics brain, so it could be 100% wrong, haha.
What does everyone think, good guess or just nuts?
'14 F150 4x4 SuperCrew 302
'11 GT MT w/ 3.73s and some bolt-ons 550 RWHP / 490 RWTQ 11.94 @ 123, 1.84 60 ft. Wannabe Sleeper