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New Rotella - Synthetic Blend
Posted by: Tom Rahochik ()
Date: September 23, 2017 02:04PM

I noticed Walmart now sells Rotella oil in a synthetic blend - both in 10W30 and 15W40. It is in a silver container and has the CI-4 designation on the back. I assume it still has the zinc additive needed for our valve tappet lubrication. I have been using the Rotella full synthetic 5W40 in the blue container for my turbo 180. Price difference is roughly about $10. All comments are welcome.

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Re: New Rotella - Synthetic Blend
Posted by: richard1 ()
Date: September 23, 2017 05:14PM

Synthetic blends can be done for different reasons. Sometimes because your base oil is too weak to pass standards, so you blend in some synthetic. Sometimes for marketing: In this case you can put in 1 or 2% and call it that. And sometimes you have a specific standard you need to meet for a specific manufacturer, so you use it.

Nothing wrong with it, treat it as a slightly bette than mineral. ZDDP will still be the same as other CI-4 oils.

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Re: New Rotella - Synthetic Blend
Posted by: Pacerace ()
Date: September 25, 2017 09:01AM

I use the Syn blend because all the conventional in 10w-30 is now CK-4 with less Zinc. The synthetics are maintaining the same formula/ratings for now. Works well for me.


Powder Springs, GA.

1965 Corvair Monza 110/4sp Coupe

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Re: New Rotella - Synthetic Blend
Posted by: matchlessmo ()
Date: September 26, 2017 07:26PM

Richard, can I use the synthetic blend on my rebuilt 110 motor 10w30.

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