It's the red loop.
the oil capacity on the 740li is 4.0. BMW badge codes have the series number followed by the oil capacity. ie. a 325i is a 3 series with a 2.5l capacity and so on.
modern BMW 6 cylinder engines take 7 quarts of oil. that's from about 1995 to current production.
The transmission oil drain plug on a BMW 3 series is an Allen plug, usually 17mm, on the bottom of the transmission.
The BMW was founded by Franz Joseph Popp. The BMW 3 series was first launched in Leipzig, Germany. The Manufacturer of the BMW 3 series was founded by the German Auto Maker BMW. The first BMW 3 series was manufactured in 1975.
No
The 2011 BMW 3-Series has 24 valves.
The 2007 BMW 3-Series has 24 valves.
The 2008 BMW 3-Series has 24 valves.
The 2002 BMW 3-Series has 24 valves.
The 2012 BMW 3-Series has 16 valves.
The 2010 BMW 3-Series has 24 valves.
The 2014 BMW 3-Series has 16 valves.