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I am not sure this is an accurate statement. I think AMSOIL S3K 5W-30 would probably yield the same viscosity control as Mobil 1 EP 5W-30. It is the AMSOIL S2K 0W-30 that seems to thicken over time, especially in larger (i.e. V8) engines. Either way, both AMSOIL and Mobil 1 would perform very...

I do not disagree that the POE basestocks are superior for their thermal stability/capacity, however any good Group III or Group IV is perfectly capable of providing what is necessary for turbo charged applications. Don't get me wrong here I think Redline is as good as anything available, but I...

I have a Cobb Stage 2 2004 WRX and run AMSOIL S2K and now S3K with very good results. http://theoildrop.server101.com/cgi/ultimatebb.cgi?ubb=get_topic;f=3;t=002809;p=1 As you can see from the UOA link above, I do appx. 10K mile OCI and frequent the race track during those 10K miles. AMSOIL...

I have a 2004 WRX and have had wonderful results with both AMSOIL S2K and now S3K. But with that said, I sometimes believe you could use water in a Subaru engine and still get good results.

Pablo, what does that mean? Are there some cases where the S3K is not ideal for gas engines?

Only the AMSOIL XL Series is API certified. The rest of their oils are simply rated for particular API Services. This is for various reasons, one being the elevated levels of ZDDP, and another being the cost related to have the right to print those API certs on each bottle of oil, which would no...

http://www.bobistheoilguy.com/moly.html

Please tell me you were joking, first off SAAB is a Swedish company, secondly a 9-2x Aero is a Subaru WRX made by Fuji Industries. I don't ever recall saying that Exxon-Mobil wasn't an American company. I also apologize for forgetting about AMSOIL's Canadian distribution centers, not that it...

Name me one American AWD, Turbo Charged Wagon with a manual transmission that drives and handles like a sports car and I will go buy it. My point is I have a WRX Wagon because it fits me to a "T" and it is really the only option in that category. My other vehicles have included a 1987 Buick...

Sometimes I just have to laugh when I see people worring so much about price differences on a couple oil changes per year. What are we talking, $25-$30 per year difference between AMSOIL and M1. Don't get me wrong, I think both are fine products but I personally choose AMSOIL for a few reasons...

I don't think this is a totally accurate statement. Yes there are several UOA that show S2K thickens over time, but I personally have (3) 10,000 mile interval UOA's that show it stays in grade even when it is abused for the 10,000 mile duration. It is not uncommon for my oil temps (I have a...

Based on my personal experience with AMSOIL S2K 0W-30 I am of the opinion that there are other issues that cause it to thicken out of grade other than just extended use. I posted my most recent UOA a few weeks ago (http://theoildrop.server101.com/ubb/ultimatebb.php?ubb=get_topic;f=3;t=002809)...

Just curious, if the AMSOIL S3000 5W-30 (HDD) truly has a more robust additive package, then why does the S2000 0W-30 specify 35K/3X OEM/1yr change intervals vs the S3000 5W-30 25K/2X OEM/1yr change intervals?

What does FM additives stand for?

I mentioned the Cobb Stage 2 package because I posted my UOA as part of a reply to an individual looking for a good oil for an '05 Subaru WRX STi and the Stage 2 package brings the regular WRX's power in-line with stock STi. Pablo, Why do you say that the S2000 0W-30 is not a "racing" oil? It...

Which of their oils would you recommend over the S2K 0W-30?

I forgot to mention that the front label on S2000 0W-30 bottle have "Race Proven" printed in the upper left corner. This seems to indicate that it is indeed intended for use in racing applications. http://www.amsoil.com/StoreFront/images/tso_bottle_350pxh.jpg

Here is a link to my last UOA. http://theoildrop.server101.com/cgi/ultimatebb.cgi?ubb=get_topic&f=3&t=002809

Date: Feb 2005 Lab: OAI Testing Oil: AMSOIL Series 2000 0W-30 Top of Oil: Same, 1qt/~10K miles Oil Filter: AMSOIL SDF-20 Air Filter: AMSOIL 2-Stage Foam Mi Unit 27,874 Mi Oil 9581 Iron 22 Chromium 1 Lead 7 Copper 10 Tin 0 Aluminum 8 Nickel 0 Silver 0 Silicon 8 Boron 23 Sodium 35 Magnesium 867...

I have a 2004 WRX with a Cobb Stage 2 setup and I run AMSOIL S2000 0W-30 at ~10K intervals (I am at 12K on my current interval). I have had oil analysis done at each change via OAITesting.com and the results have always been "No corrective action required, oil is suitable for continued use"...