0W-30 Oil, Whats your view on this

I noticed yesterday that Mobil has come out with fully synthtic 0X-30 Oil. They claim it would save you more money as far as gas mileage goes. Just wondering what others think of this, and how safe would it
be to put into a older vechile.
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I'd saty with the MFG recommended oil weight for your engine.

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bdeditch wrote:

The better cold pumping of a synthetic 0W-30 oil will work fine in any engine specified for 5W-30 or 10W-30. The first number refers to the cold characteristics of the oil and the second to it's viscosity when at operating temperatures.
Many people make the mistake of thinking that a 0W-30 is "thinner" than a 10W-30 because it is indeed so at room temperatures, but when hot they are the same grade.
Fuel economy improvements would be limited to the short time the oil is getting heated up, so if your commute is a short sub 15 minute one after a stone cold start it might make a difference.
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