Date registered: Oct 2008
Vehicle: '03 ML320
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Engine Knocking after Oil Change - PLease Help!
Hi, I changed my oil for the first time yesterday. I do not know what kind of oil the last person was using (since it was bought used from a dealer). However, I used 10W40 Mobil 1 High Mileage to replace it.
After I changed the oil (as well as filter - Mann OEM), I drove the car back into the garage. I did not hear knocking at this time.
Then today when I used the car for the first time, I hear knocking.
The knocking did not start immediately upon starting the car. I only hear the knocking sound about 90 seconds after start up. When I drive it, I can still hear it.
When I am standing outside the car, I cannot hear the knocking sound.
When I get into the car and close the door, I can hear the knocking sound.
In addition, I do not know if this is normal or not since I never paid attention...but I think I can hear a very faint high pitch near the cat. as well if I really put my ear under the car...
Please help? What if the last person used mineral oil...would this be the reason I am experiencing the problem since I used M1 fully synthetic now? Or could it be another problem?
The car runs perfectly fine, but I am worried nonetheless.
'03 ML320 - Metallic Silver - TX!