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Originally Posted by 2007 ion2
like I said, 0W30 is for better cold starts, I do not need to worry about that anymore.
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It helps all
cold engine starts, not just
cold weather starts.
If one lives in a very cold climate, 0W30 may be required because of the low temperatures - but that doesn't mean it can't be used in warmer climates for its fuel economy benefits.
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my question is why didn't volvo release a change to the recommended tire pressure for that vehicle?
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Dunno.
I originally started running a higher pressure in my 17" wheels to improve handling - based on reports from other users - as steering felt quite mushy, wandering all over the place on.
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nitrogen is stable enough to make a difference. I drove my saturn (with a proper nitrogen fill in all 4 tires, from the factory), from -40F weather down to tennessee (I think it was 30F), and didn't see a difference in tire pressure
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I'd expect to see a small pressure difference, based on a 33°C / 70°F increase in temperature.
The laws of physics don't change because tyres are filled with another gas.
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nitrogen also stays filled longer, leading to less need to check the pressures.
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Making people forget about it even more ...
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it does this because it has physically larger molecules.
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While true, rubber tyres aren't exactly molecular sieves that differentiate between O2 and N2 ...
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it will also help protect TMS equipment and alloy rims commonly found on modern cars because of the lack of contaminates.
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Is corrosion on the inside if the rim a problem at all ?
It's pretty much a shielded environment.