[s-cars] Re: [acna_pcc] Still on 4 cylinders...

[Bruce]

Jim;
I have a 2000 S4, used Mobil 1, 15-50 since it was new, with OEM oil 
filter.  I have had no problems that I can trace to the oil.  Good luck 
in tracking down the problem.
Bruce Cranford

AUDIJIM at aol.com wrote:

>S-heads,
>
>Here's a new one for you. I changed the oil in my S4. I used an OE Audi 
>filter and Mobil 1 15-50. Now the car runs worse than it did before I changed the 
>oil. It used to run on 4 cylinders as soon as you start it. Actually, it starts 
>on 5 and then drops #4 until it warms up a bit and them hits on all 5. Now it 
>runs on 4 for a lot longer duration than it used to. I'm seriously thinking 
>of swapping another AAN I have on a stand into the car over Christmas break 
>from work. I have off from the 24th through 03 JAN. I'll swap over all the RS2 
>stuff and see what happens. I'm at a total loss here for this problem. I'm 
>either tracking down a cylinder/piston problem or a cylinder head problem at this 
>point. What throws me for a loop is the starting on 5 cylinders and always 
>dropping #4. Even when I run the car on 4 cylinders, it starts to even out over 
>3000 RPM. But I think it's only feeling like it is, as soon as I shift up, the 
>RPM drops and I feel the missing cylinder. Back to the beginning, how could an 
>oil change effect the running condition so much? I do not know what viscosity 
>the previous owner used, and this was my first oil change since I purchased 
>the car.
>
>Jim
>
>
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