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Originally Posted by Frank M
Then why do lubes have a manufactures spec?
such as :
Mobil 1 0W-40 keeps engines starting in Arctic-extreme cold, and it cleans deposits, sludge and varnish often formed in high temperature operating conditions.
Mobil 1 0W-40 meets key industry and car builder specifications for:
− Mercedes MB 229.5
− Porsche Approval List 2002
− GM-LL-A-025 (gasoline)
− ACEA A3, B3/B4
− BMW Longlife 01
− VW 502.00/505.00/503.01
− GM-LL-B-025 (diesel)
− API SM/CF
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It's called marketing.
Notice how Mobil 1 meets so many specs? That's because there's not 2 cents worth of difference between them, and it's not rocket science to meet them. But, as we know when it comes to getting a manufacturer's blessing (think Porsche approved tires), there's a cost involved in getting that blessing. Not having it doesn't mean you don't meet, or exceed it. As a manufacturer of oil, you pay for the privilege of putting that spec on your bottle. It's about money.