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SilverXLR2004 05-22-2008, 04:26 PM Recently, I have experienced some knocking noise coming from the engine . Actually, the noise disappeared very shortly. Does this have to do with K&N air filters? Or is it because I parked my car for 1 week? (note that I use 98 octane fuel). XLR_Lover 05-22-2008, 04:31 PM Recently, I have experienced some knocking noise coming from the engine . Actually, the noise disappeared very shortly. Does this have to do with K&N air filters? Or is it because I parked my car for 1 week? (note that I use 98 octane fuel). 98 OCTANE!!!! Probably more than the car can handle!!! :lol WOW!!!! Floyd SilverXLR2004 05-22-2008, 05:23 PM It is not consistent with the rpm and i think it is ticking. I checked the engine oil it is a little bit below normal. Does this mean i have to add oil right away? It is a weekend here and i am waiting until sunday to get the right oil from the dealer. Is there any problem if i drive for 2 days? Knocking or ticking? Is it consistent with the engine RPM's (i.e. does it rise and fall with the RPM). If it is ticking, check your engine oil level. Might be a bit low causing a little bit of valvetrain noise. Thanks, Dr. Design D3 Cadillac | ||