Castroil Syntec commercial featuring... you guessed it an RX-8
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Originally Posted by Gord96BRG
There you go - if the argument is that Syntec isn't really a synthetic because it's not made from a PAO base stock... then there goes any argument against using it! If you wish to consider Castrol Syntec as just an extremely good, extra-refined mineral oil (which it is), then Castrol Syntec should meet the needs of parties on both sides of the argument about using synthetic oil in rotaries.
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From: Houston
As StealthTL (the oil production engineer, works in a refinery, remember him? ) says above, ANY oil that meets API SL 5W20 is approved. Further, as has been extensively discussed,
NO oil being produced that meets those specs is pure mineral oil. In order to meet API SL 5W20, EVERY 5W20 oil on the market is a synthetic blend. Period. If you're using 5W20, you ARE using a certain amount of synthetic oil already.
Stop worrying about it. Synthetic is better - even for rotaries. Because of the high engine heat of rotaries, many would say synthetic is better especially for rotaries.
NO oil being produced that meets those specs is pure mineral oil. In order to meet API SL 5W20, EVERY 5W20 oil on the market is a synthetic blend. Period. If you're using 5W20, you ARE using a certain amount of synthetic oil already.
Stop worrying about it. Synthetic is better - even for rotaries. Because of the high engine heat of rotaries, many would say synthetic is better especially for rotaries.
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