Quote:
Originally Posted by upallnight
The old fashion Hypoid gear oil in days gone bye stunk really bad, but the new synthetic oil doesn't stink as bad.
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Hmmm... every synthetic GL5 gear oil I've ever used (Mobil 1, Redline, Amsoil, Royal Purple) smells foul. The difference between motor oil and gear oil in terms of smell should be obvious. If it doesn't reek, it's motor oil.