Hi, Well, thanks to the many help/advice, I was able to change the oil on my 512TR this past week. Now the weird thing after the oil change is that upon decleration(when I take my foot of the gas and just let coast) I hear this weird noise that sounds like when you have a nail in your tires(but not as loud). 1) I've checked my tires, and there are no punctures or imbedded objects 2) The sound is not audible upon acceleration 3) The car was running fine prior to the oil change 4) The oil used is Mobil-1 5-30 synthentic - there is no leak after the oil change. 5) When I decelerate with the car in gear, and then shift to neutral, then the sound is reduced from 10/10 to 2/10 respectively. 6) This happens in any gear - 1st - 5th. 7) At a stop light, if I depress the clutch, and place it in 1st gear - with the clutch still depress - I feel a slight pulsating vibration in the clutch pedal - Unfortunately, that pulsating feeling is not consistent, or on a regular time interval. 8) My car does leak about 3--4 drops from the clutch housing/gearbox after a drive Where should I start to troubleshoot this?? I guess I should refrain from driving it in the meantime until the problem can further be diagnosed & fixed? Thanks in advance.