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<blockquote data-quote="vankuen" data-source="post: 10256839" data-attributes="member: 92185"><p>This is probably a bit dated--but found this on the net when trying to find more info: </p><p></p><p><a href="http://www.nordicgroup.us/oil.htm" target="_blank">Motor Oil Myths and Facts</a></p><p></p><p>I posted this because there's this undertone that Amsoil's product is looking out for the consumer where the other companies are not in terms of engine longevity (i.e. the amounts of zddp / zinc and phosphorous in the oil and it's tendency to shear). This information seems to confirm the lower zddp levels, but gives a different spin on it in saying that's the best thing to do. </p><p></p><p>The other thing I'm trying to figure out is the notion that 5w-50 isn't as good as 20w-50 when in fact the oil viscosity at operating temp is the same and only cold viscosity differs. Is it because the premise is that in order to get the lower cold viscosity rating the oil requires more modifiers?</p></blockquote><p></p>
[QUOTE="vankuen, post: 10256839, member: 92185"] This is probably a bit dated--but found this on the net when trying to find more info: [url=http://www.nordicgroup.us/oil.htm]Motor Oil Myths and Facts[/url] I posted this because there's this undertone that Amsoil's product is looking out for the consumer where the other companies are not in terms of engine longevity (i.e. the amounts of zddp / zinc and phosphorous in the oil and it's tendency to shear). This information seems to confirm the lower zddp levels, but gives a different spin on it in saying that's the best thing to do. The other thing I'm trying to figure out is the notion that 5w-50 isn't as good as 20w-50 when in fact the oil viscosity at operating temp is the same and only cold viscosity differs. Is it because the premise is that in order to get the lower cold viscosity rating the oil requires more modifiers? [/QUOTE]
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