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BMW designed the S54 with approximately half the industry standard oil clearance.  This is a trendy move among some auto manufacturers to increase gas mileage and increase horsepower.  But when they do it, like in...

The E86 Z4 M Coupe was one of the shortest-lived M cars but it was certainly never forgotten. Equipped with the S54 motor from the E46 M3 and only available with a 6-speed manual gearbox,...