"In its ruling of June 24, 2016 (case no. 6 U 78/15), the Cologne Higher Regional Court ruled that only those motor oils without mineral oil content that consumers have known as fully synthetic since the 1970s may be advertised as "fully synthetic" without restriction. This product group only includes oils whose base oil content consists of API groups IV and V. For other synthetically produced motor oils, a notice must be provided if they are to be advertised as "fully synthetic"."
"The judges of the Federal Court of Justice recently had to take an exciting excursion into the world of petrochemicals: The question to be clarified was whether a lubricant chemically refined by "hydrocracking" could be advertised as a "fully synthetic engine oil of the new generation". The Federal Court of Justice denied this and confirmed the argument of the lower court: the consumer does not expect mineral oil under this name, but an artificial product (BGH, judgment of June 21, 2018, case number I ZR 157/16)."
I noticed that there are too many statements on this forum from people who do not know the matter but write their guesses with confidence and attack others to look knowledgeable and important.
"The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts"