Castrol GTX question

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Sep 15, 2002
Scottsdale, AZ
Does anyone know if Castrol GTX has always had moly in it or was it added within the past few years or so? Just curious since I've used it for about 100K on my truck. (Can't remember why, now, but I switched to Valvoline about 1.5 years ago. [Frown] ) Thanks.
It appears they just added it with the SL formulation, as some of the oil analysis results on the maxima spreadsheet show no moly in the GTX from earlier reports.
Just a comment about Castrol. The only 3-4 different times i have used it, both 10-30 and 5-30, i have had metal particals on the end of my magnetic dipstick. This has never happened to me other than with Castrol. I felt it doesn't do well with wear.
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