I used to use Castrol GTX for the same reasons most people use the Rotella T. I then switched to the Rotella T. There is a noticable difference with this
oil. It maintains low rpm
oil pressure better than the GTX and doesn't seem to contaminate as fast.
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Sal Mennella
CSX 4241, KMP 357 - sold and missed, CSX 4819 - cancelled, FFR 5132 - sold
See my car at CSXinfo.net here >> CSX 4241