My old post from other forums:
------------------
My 2001 A4 is driving me crazy. It’s only about 60 000 miles (90k kms), I bought the car 5 months ago and here is the history:
1. As soon as I bought the car, I changed oil (Castrol Syntec 5W40, Group 3 synthetic) and drove about 3k miles, tapping noise was there whether cold or hot engine, a little bit better when hot
2. Then I did Pro-Line (Liqui-Moly) Engine Flush and switched to Liqui-Moly 5W40 full synthetic (Group 4 or 5, not sure) and drove 3k miles again, I noticed that as I was approaching 3k miles since last OCI, the tapping noise was almost disappearing when the engine was hot, but it was still present
3. Then I made a stupid decision, because Liqui-Moly oil can take another 3K (6k total) before having to change it, but I ran
seafom for 20 min (idling), drained the oil and put 1qt of Rislone + 3qt of Castrol Syntec 5W40 again because Rislone apparently cannot be used with full synthetics.
Oh man, the noise has never been higher, like I have water instead of oil. I have driven 200 miles so far with this combination and it’s really bad. I was hoping that 200 miles should be enough for Rislone to start working, but nothing.
In my desperation to do something, I bought Castrol Syntec European 0W30 (Group 4) and getting ready to dump the 200 miles old oil/Rislone, but what a waste.
---------------------------
Now, all I can say, I drained the Syntec/Rislone after about 500 km, put in GC 0W30 and:
- first 100 km was similar, clatter all the time, hot and cold
- at about 200-250 km, and good 1/2 hour drive (city), ticking is disappearing, it still thicks when cold though.
Will report back in 500 km.
------------------
My 2001 A4 is driving me crazy. It’s only about 60 000 miles (90k kms), I bought the car 5 months ago and here is the history:
1. As soon as I bought the car, I changed oil (Castrol Syntec 5W40, Group 3 synthetic) and drove about 3k miles, tapping noise was there whether cold or hot engine, a little bit better when hot
2. Then I did Pro-Line (Liqui-Moly) Engine Flush and switched to Liqui-Moly 5W40 full synthetic (Group 4 or 5, not sure) and drove 3k miles again, I noticed that as I was approaching 3k miles since last OCI, the tapping noise was almost disappearing when the engine was hot, but it was still present
3. Then I made a stupid decision, because Liqui-Moly oil can take another 3K (6k total) before having to change it, but I ran
seafom for 20 min (idling), drained the oil and put 1qt of Rislone + 3qt of Castrol Syntec 5W40 again because Rislone apparently cannot be used with full synthetics.
Oh man, the noise has never been higher, like I have water instead of oil. I have driven 200 miles so far with this combination and it’s really bad. I was hoping that 200 miles should be enough for Rislone to start working, but nothing.
In my desperation to do something, I bought Castrol Syntec European 0W30 (Group 4) and getting ready to dump the 200 miles old oil/Rislone, but what a waste.
---------------------------
Now, all I can say, I drained the Syntec/Rislone after about 500 km, put in GC 0W30 and:
- first 100 km was similar, clatter all the time, hot and cold
- at about 200-250 km, and good 1/2 hour drive (city), ticking is disappearing, it still thicks when cold though.
Will report back in 500 km.