My revs lagging a bit, me thinks

[shay2nak]

I had my 2nd oil change done recently about 300 miles ago and when I got the car back I noticed that the car did not rev as quickly as before. The car felt "heavier." I had made some vid clips of my car and posted them on YouTube (link in my sig). One of those vids is a standing start to 60mph. Just to see for myself, I recorded another 0-60 clip today and it looks to me that my car is revving slower than before. What could cause this? The oil that was in there from 1100-3800 miles was Havoline 5-40 (whatever Lotus dealers have) and from 3800-presently 4400 I have Mobil 1 Diesel 5-40. Do you think it's the oil? Maybe the thickness or viscosity of the oil is slowing my engine down? Other than the oil, wiper fluid container was filled with water. (adding weight)

I don't think 5lbs would slow my car down that much! Well, it is a slight decrease in engine speed.

Or maybe I'm mental? Either way the car doesn't feel as fast as before.

Maybe I've got a SC vacuum leak.

[JMY]

Maybe you got used to the speed and need the FF upgrade !!!

[Jack]

Originally Posted by shay2nak

I had my 2nd oil change done recently about 300 miles ago and when I got the car back I noticed that the car did not rev as quickly as before. The car felt "heavier." I had made some vid clips of my car and posted them on YouTube (link in my sig). One of those vids is a standing start to 60mph. Just to see for myself, I recorded another 0-60 clip today and it looks to me that my car is revving slower than before. What could cause this? The oil that was in there from 1100-3800 miles was Havoline 5-40 (whatever Lotus dealers have) and from 3800-presently 4400 I have Mobil 1 Diesel 5-40. Do you think it's the oil? Maybe the thickness or viscosity of the oil is slowing my engine down? Other than the oil, wiper fluid container was filled with water. (adding weight)

I don't think 5lbs would slow my car down that much! Well, it is a slight decrease in engine speed.

Or maybe I'm mental? Either way the car doesn't feel as fast as before.

Maybe I've got a SC vacuum leak.

Ara,

There is a Factory TSB out on possible vacuum leaks for the S -- something to do with the I/C plumbing/O-ring gaskets. Richie knows about this TSB since he's the one who showed it to me. Have him check it out under warranty.

[shay2nak]

Originally Posted by Jack

Ara,

There is a Factory TSB out on possible vacuum leaks for the S -- something to do with the I/C plumbing/O-ring gaskets. Richie knows about this TSB since he's the one who showed it to me. Have him check it out under warranty.

Thanks, Jack.
I will have him inspect it.