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Originally Posted by KSC
edit: I got most of the info I was looking for.
What I'm still trying to figure out, is if a failsafe way to determine the difference (from the bottle itself) between the Scooby SM and SN formulations was ever discovered?
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I'm lazy so I'll just copy my post from the Forester board in response to someone that was surprised dealers are still using SM oil:
Any oil to get the API Certification Mark after September 2011, MUST be GF5. I suspect that SoA just ordered way too much of the original SM/GF4 oil. Otherwise, Idemitsu would be manufacturing oil that does not meet proper specs. OTOH, the SM/GF4 oil is pretty much impossible to find in Canada.
This is a response to my email in early September 2011.
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Thank you for taking the time to contact us. All Subaru Synthetic Motor Oil is licensed by the American Petroleum Institute (API) as Energy Conserving SM for Gasoline Engines and GF-4 ILSAC rated.
Information on our future products is not available. We do appreciate though that you brought your interest to our attention. Your message has been documented in our Customer/Dealer Services database. This will allow for your message to be properly reviewed, tracked and considered by our Product Management Department. Subaru is always striving to improve upon our products and appreciates when our customers bring their recommendations to our attention.
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About the cutover date:
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After September 30, 2011, the ILSAC GF-5 minimum performance standard for gasoline passenger car engine oils becomes the only basis for issuance of a license to use the API Certification Mark.
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http://www.infineum.com/Pages/gf5-11.aspx
The older Idemitsu oil had high levels of moly and Subaru owners were specifically looking for SM oil. Then the SM labeled bottles started showing reductions in moly. Maybe they could just be using old labels, who knows.
-Dennis