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Re: Synthetic Motor Oil: Extended Drain Interval - or Not?
Posted to Castrol Forum on 3/2/2017 6 Replies

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Subaru are not the only ones who use the term "synthetic", and very loosely.

Very often all that is in the owners manual is... "Synthetic SAE 5-W-30", or "Full Synthetic SAE 5-W-20".

Of course th... Login to read more.

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