Comparing GC to Amsoil S3K

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Dec 20, 2002
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How does GC 0w30 oil compare to Amsoil S3K [ 5w30] oil in terms of extended drains, cold and hot weather use and lubrication? Ams costs double in price.
 
Hey,

While I don't have scientific proof or hard data to compare the 2, from reading used oil analysis and research both seem to be top notch oils. Though, one would think S3K is a diesel rated oil it has more cleaning power and a beefy additive package than would GC, this is only my thinking,,,,,AR
 
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