Engine oil Castrol or RED LINE

I have decided to use Castrol GTX 5W-30.

For your hi-mileage IDI w/ 'consumption' fever, stick with the 15w-40, probably in a dino, and add a qt of synthetic same wieght same brand, at change You will get the lubricity of the snythetic for fraction of cost.

Wear values perfect ! Looks like Redline is lowering the Moly value some . Your nox is normal but new plugs or wires could help lower the values, Oxd is elevated by cleaning effect of the POE base and lab equipment hates Redline, no problems though. Second change on this oil will drop OXD values. As I said before I have not seen this formulation before but it looks ROCK solid. Good TBN retention.

I'm currently using Castrol Syntec 5W-30.

RED LINE oil.... nothin beats it.. the real racing oil... very expensive.. but you gotta treat ya VR right

my car seems to like castrol gtx 20 w 50 the best...i have tried them all...

My oil changes have been all at the dealer, at 15,000KM (about 9300 miles) intervals, Castrol Syntec.

Castrol Syntec 5W50 is what I use in my car, and it didn't burn any more oil or leak at all when I made the switch at around 123,000 miles... I change it every 4,500 miles or so..

I switched from valvoline 20w50 to castrol. No problems since. Before, my temp was going haywire. Castrol solved it for me.