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I've always had good luck with Rocky Mountain, and they carry it.
http://www.rockymountainatvmc.com/p/49/-/263/732/-/1319/Golden-Spectro-4-Semi-Synthetic
Rocky Mountain might be a great store but the same oil is 60% more there than on Amazon.
If you are going to mail order oil because you can't find it locally why pay more?
If you can't find it locally this would work.
http://www.amazon.com/Golden-Spectro-Engine-Lubricant-20W-50/dp/B003C1ASV0
That oil is for Harleys with wet sump, it might work, but the Golden 4 Spectro is what BMW recommends.
1. I doubt your engine can tell the difference.
2. Someone please lock down this thread before someone starts talking about synthetic.
In the past, I've bought the Golden Spectro by the case from my local BMW dealer.
I started an oil thread...of sorts in the Airheads forum. I have completed testing of 18 oils similar to testing that was done by Jeffrey DiCarlo (1999) and Matt Parkhouse (2002). My results start with this post:
http://forums.bmwmoa.org/showthread.php?63581-Oil-Analysis-Update&p=842930&viewfull=1#post842930
The Spectro products, BMWs, as well as some other popular oils were tested for ZDDP, viscosity, and TBN. I will be submitting an article to the ON soon.
I've never seen Golden Spectro sold at the dealer. If you mean that the BMW oil is blended by Spectro, then yes, the dealer sells that. But not the straight-up oil in Spectro bottles.
Can I bust into my new gallon jug of Rotella T6 yet?-Or must I wait for the results?