Originally Posted By: SR5
Hey MS,
If you want to use GTX then go for it. Like Aquariuscsm, GTX was the first ever oil I purchased with my own money, so I have a soft spot for it too.
Castrol GTX has kept pace with changing times, it's available as a modern API SN mineral oil, and should look after you fine. Here is a recent PQIA GTX analysis and it looks good:
PQIA GTX10W40
Novack = 11%
Zinc = 860 ppm
Boron = 166 ppm
Moly = 85 ppm
TBN = 7.3
Nothing wrong with those numbers.
Back in the day the entry level oil for Castrol was XL then GTX was their better oil and then came their high end synthetic stuff like TXT or Formula-R. So GTX wasn't their entry level stuff, it was the next level up. Today for Castrol their entry level stuff is GTX, then Magnatec, then full synthetic Edge. So in some respects the modern equivalent of the old GTX would be the newer Magnatec (or GTX Magnatec).
Now GTX is mineral, Magnatec is either semi-synthetic or full synthetic (depending on grade) and Edge is always full synthetic.
I recently used some modern SN rated GTX and liked it.
BITOG GTX
A few weeks ago, I dropped the GTX from my sump, and filled it with Castrol Magnatec 10W30 semi-synthetic, and I like it even better.
That a great info. Thank you. I post some pix next oil change on castrol GTX, Its feel good to use it again.
This my new baby, 1998 Mustang GT 4.6L all original, california car, I am the second owner. I had 98 Mustang gt black ,look exactly just like this, accept the color, everything else is exactly the same, I sold it back then and been looking for it for 4 years now, I even pay some one to locate it for me, but no luck, so recently I gave up and saw this one pop up, and call the owner and bought right away. This white one will replace my black one,and I am plan on fixing what ever problem it have and plan on keeping it forever ( just like rest of my cars lol ) , with moneys I made now , there is no reason for me to let any of my baby go.
First thing I did to this white stang is take to the tint shop for some tint.