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Titanium: As I have tried to explain in my post, HTHS viscosity rating reflects the oil viscosity at a shear rate of 1 million reciprocal seconds. So, if the shear rate of the oil film between two surfaces being lubricated is greater than 1 million reciprocal seconds, there will be further...

My car is an Audi 1.8T and the appropriate oil to satisfy the lubrication needs of the turbo must meet VW502. A key requirement within VW502 is ACEA-A3. Hope you will find the following useful and comments are welcome: HTHS specification ensures sufficient lubricant film strength for engine...

_____________________________________________ VeeDubb asks: "Do you drive the car hard or do anything that might contribute to the elevated iron level?" _____________________________________________ Did the quattro Challenge during the 1st half of the 5W30 interval. Comparing both oils show...

Congrats John, excellent results. I am considering using Amsoil 0W30 at my next oil change (2002 Audi A4 1.8T quattro manual). I have just posted a series of results for M1 SS 5W30 & 0W40. Each taken to 10K. One concern that I have and would like to get the opinion of the forum members, is the...

Quote: ---------------------------------------------- What do you have in there now?? ---------------------------------------------- Thanks for all the comments guys. I have M1 SS 0W40. If I had the analysis results before my 30K dealer service, I certainly would have put M1 SS 5W30. I do agree...

Newbie here. This is my first post, but I've been lurking in the background. I find the forun very informative and enjoy the dialogue between the members. Quattro Pete had already posted on my behalf, samples #1-5 results in an April 24, 2003 post. Thanks man. Sample #6 is the final in a...