Yeah, the mazagine you're talking about is published by BMW and is a thinly veiled marketing tool. Fun to read still, but not much more than a large ad. Roundel (the magazine of BMWCCA) is a great magazine, published monthly and as AcmeExplosives mentioned it is worth the membership just for the magazine.
https://www.bmwcca.org/members/AM/Te...oinsection.cfm
There used to be a way to put the referral information into the link, but their website technology is circa 1956 and I lose patience with it....