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  #1  
Old 01-11-2005, 10:47 AM
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Is your car smoother after an oil change?

I know it may well be my imagination, but I swear my car sounds smoother right after an oil change. My friend claims the same for his '84 300D. I will have to see if I can tell how long the feeling lasts, but listening to it idle after the 18 mile drive to work it sounded smooth and quiet.

Kevin

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Old 01-11-2005, 12:26 PM
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My Euro 500SEL sounded much smoother after the oil change I gave to it a few weeks ago. But then again, that was its first oil change after sitting for almost two years!
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Old 01-11-2005, 12:40 PM
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I noticed the same thing........funny...not sure if its a placebo effect or not....
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Old 01-11-2005, 12:41 PM
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KCampbell,

NO, not smoother after oil change. It might be the placebo effect.

P E H
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  #5  
Old 01-11-2005, 12:44 PM
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To determine if it is indeed the placebo effect, try filling the crankcase with water instead of oil and then you can see whether it's the fresh oil or not.
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Old 01-11-2005, 01:41 PM
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Quote:
Originally Posted by SHARK1007
To determine if it is indeed the placebo effect, try filling the crankcase with water instead of oil and then you can see whether it's the fresh oil or not.
I thought you were supposed to use kerosene
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Old 01-11-2005, 02:00 PM
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Come on stop making fun of you know who.
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Old 01-11-2005, 02:06 PM
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This is no joke now. A friend of mine found that his Vette was blowing blue smoke. He drained the crankcase, filled it with some sort of solvent up to the valve covers and ran the car for 30 seconds. Drained it and had all sorts of black sludge. He figured the car was due for a rebuild anyways. Filled it with fresh oil and drove it for a bit, and drained and filled the pan again. Seems it was fine after that.
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Old 01-11-2005, 02:23 PM
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Quote:
Originally Posted by aklim
This is no joke now. A friend of mine found that his Vette was blowing blue smoke. He drained the crankcase, filled it with some sort of solvent up to the valve covers and ran the car for 30 seconds. Drained it and had all sorts of black sludge. He figured the car was due for a rebuild anyways. Filled it with fresh oil and drove it for a bit, and drained and filled the pan again. Seems it was fine after that.
I'm surprised that didn't split the oil pan from stem to stern.
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Old 01-11-2005, 02:23 PM
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Quote:
Originally Posted by aklim
This is no joke now. A friend of mine found that his Vette was blowing blue smoke. He drained the crankcase, filled it with some sort of solvent up to the valve covers and ran the car for 30 seconds. Drained it and had all sorts of black sludge. He figured the car was due for a rebuild anyways. Filled it with fresh oil and drove it for a bit, and drained and filled the pan again. Seems it was fine after that.

Wow He's lucky the motor did not hydrolock...
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Old 01-11-2005, 02:50 PM
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I don't notice a difference after I change the oil.

Scott
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  #12  
Old 01-11-2005, 02:55 PM
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I have noticed a slight increase in smoothness after an oil change, mines getting one tomorrow or thursday so I'll be sure to try and pay attention closely before and after.
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  #13  
Old 01-11-2005, 03:25 PM
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Going to change to Mobil 1 Truck and SUV aka Delvac 1. We'll see.
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  #14  
Old 01-11-2005, 05:38 PM
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I filled my '80 TD crank case (to the normal level sans filter)with diesel and let it run for 1 minute (right after I bought it), and drained it. Very black diesel, and a much better running engine. Is is a wise move? Have no proof one eay or the other, but many older marine diesels I've worked on seemed to like it years back.
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  #15  
Old 01-11-2005, 07:09 PM
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If I really stretch it I could see that maybe if your crankcase contained some light distillates and the vapors were getting into the combustion chambers they could make the engine run a little differently. It is a stretch.

Years ago I did a similar flush job on an engine that had little to lose. Don't know if it did any good but the engine ran a long time afterwards. Don't remember what I used, probably diesel. Seems like it was right before I dropped the pan and valve covers and had them dipped while off. All in all it removed quite a lot of crud from the engine.

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