Engine oil Castrol or Shell

First oil change after filling with T-6 on my 2002 Saab 9-3 (that didn't have a kit on it) I bought with 130k miles on it was really black, almost a bit sludgy. Next few oil changes quickly got better as the detergent broke down sludge in the top end and cleaned the motor up.

I used Rotella T6 for the past few years and no issues

I go for Castrol for BMW. Somehow this machine really likes it.

I’ve been using castrol edge euro 0w-40 for years and loved it. Seems to be discontinued, can’t find it anymore. That sucks, moving to mobil 1 euro 0w-40.

I run Castrol Power 1 in my KTM 350 4T. I'm just past 800 hrs with \~25hr oil changes. It meets the JASO specs my bike requires. I have not changed a clutch ever since I bought it at 280 hrs. I had the motor apart at 500hrs and the Nicasil bore coating was \*perfect\*. That was the last time I swapped out the piston.

5W40 Castrol

oks yang oil

pero maybe wag mo sagarin sa 6K

go for around 3k-4k dun mo na palitan

I am using shell advance ultra 10w-40 and hindi pa ako nagkaproblem dito sa oil na ito.

Currently using Castrol Edge 5w-40 fully synthetic, previously was using Estremo Heatpro 5w-40 FS, differences is so minimal to the point where you just neglect and forget about it....

Smoothness the same, silky smooth.

Car feels slightly like just slightly lighter on pickup with Castrol.

I used castrol edge on my last change but I don't like the way the oil looks after a few months of driving. Of course it was extreme temperatures down here in South Texas. Wonder if the extreme heat caused my oil to look kinda jello looking haha.