SOURCE: recommended oil for a 1988 mazda rx7
are you sure you want to start using it. Yes it is a great product but it wont bring an old engine, magically, back to life. If anything it is thin like moble-1. So on an old engine it could start to leak oil from the main seals and/or start to smoke from worn rings. and royal purple is a full synthetic. Don't mix it with conventional oil.
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