- the required specification; it is rare that the label on the package does not correspond to reality, because oil firms exercise mutual control.
- Required oil viscosity. It depends on the prevailing outside temperature and can be taken from the graph on the previous page.
Other factors such as price or origin say nothing about its applicability!
Engine Oil Additives
«The use of additives - no matter what kind - in lubricating oils is contrary to our operating instructions and may lead to warranty and business disputes». This is Opel's opinion on additives in oils. Whether the additional cost of oil additives affects the corresponding lengthening of engine life remains a controversial issue - especially in the case of high performance oils.
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