ExAudiSi wrote:
Sean Smallman wrote:
Are you listening Jim
If this stuff is so good and the distributor is so confident in his product, surely it comes with a money back guarantee

I think it does...
One of my colleagues at work has put some in his old Audi 90 20v and swears that it has made a huge improvement. However, one of our local members with an 944 S2 is also trying some at the moment. I'm sure he'll add his thoughts once it's been in for the prescribed length of time.
As stated I tried 750mls of Amtech in my S2 to see if it would help with the tappet noise I have had diagnosed as needing replacement cam followers (16x). I put it in around 350 miles ago and it does state it can take up to 500 miles to see any effect and 1000 miles before fully effective.
I put mine in just after an oil change and engine flush as per instructions and initially the oil pressure went mad only reaching 4.5/5 bar when revved very high whereas it normally sits at 4.5/5 bar even when hot once over 1500rpm. This as you can imagine was rather worrying however after a quick run out of around 30miles the oil pressure has stabilised to what it was before so 3.5-4 bar on tickover when hot and 4.5/5 bar over 1500rpm.
I can't say it has made the engine quieter as yet, but although my car hardly used any oil previously it would when revved up to 6000rpm blow a little smoke out of the rear for the first few times, this has stopped and the engine does seem to rev more freely.
I will add more details when I get the required mileage covered but to date it has stopped any smoking at high revs and definately improved the engine response and before people tell me it is because of the oil change I had ran the car for 100 miles after the change before adding the Amtech.