Castrol GTX Diesel 15W-40

Bird Freak wrote:

superk wrote:
I believe the diesel trucks in the fleet for the company I work for all use castrol.

Is there some reason why we shouldnt be using it? I know its a lower-grade oil, but apparently it was better than most of the 'bought in bulk' oils.

You are dead wrong on Castrol being a low quality oil. We have used it for years and it was a highly recommended oil By VW and Porsche back in the day. It could handle the high heat of air cooled engines with out break down. :R

Yeah,
I too wondered where the idea of Castrol being a "low quality" oil came from too. I'm by far, no oil expert but, as far as I know, Castrol's been used widely in a zillion cars, trucks, motorcycles and more for decades and, with a good following too. I use Delo 400 15-40 as a choice for our C-7 CAT.
Scott