Castrol GTX 10-30 Good Oil????

[DCT]

Is it good oil for high rpm engine?
7000 red line. Where can I find numbers on it? Is it better oil then Mobile 1 10-30 syn.????

 

[Rick]

Considering that Mobil 1 is synthetic and GTX isn't you can't realy compair the two because we all know you can do far more millage with Mobil 1 then you can with GTX.

 

[Virtuoso]

It is not better than M1 10w-30. However, I use Castrol GTX 10w-30 in my '94 Taurus SHO (Redline is 7,300 - and it does see it often). I just change the oil every 3k miles and use an oversize oil filter and roll with it.

 

[Al]

Not really fair to compare it against Mobil 1 as was mentioned. But for frequent oil changes (with no abnormal conditions)- it will yield results equal to Mobil 1. Once you push it beyond 4K all bets are off. Also with lots of high rpms it's possible to shear down (become thinner)- in as little as 3K miles.

Check Used Oil Analysis (UOA) here:
http://theoildrop.server101.com/ubb/ultimatebb.php?ubb=forum;f=3