Subaru Enthusiasts Car Club of the Sierras - View Single Post - New SM oils good for cats, bad for engines?

Dean · 2006-04-23, 03:30 PM

OK, I am just getting up to speed on this, so I am no expert, but it appears the new API SL oil standard has fewer anti-galling agents (Phosphorous and Zinc) which are good for metal-metal contact areas such as bushings, bearings, valve train, etc.

So basically, when Mobil 1 changed away from colored caps, they lowered our engine protection. Apparently it started before that back with the SJ-SL change, but the SM has taken almost all of these components out.

I am still researching this, but check out this thread and this link to start with.

Super Trucker... Can you get us a deal on some Diesel oil?

May have to go Red Line which is all the Stealth has had in it since I got it, though they don't appear to publish their numbers...

And if you can find any blue cap Mobil 1 anywhere, buy it.

2006-04-23, 03:30 PM	#1
Dean Señor Cheap Bastarde Real Name: Dean Join Date: May 2003 Location: $99 Tire Store Posts: 9,294 Car: $.04 STI Class: Fast,Cheap & Reliable=STI Deal, did somebody say Deal? Oh, Dean, yeah that's me.	New SM oils good for cats, bad for engines? OK, I am just getting up to speed on this, so I am no expert, but it appears the new API SL oil standard has fewer anti-galling agents (Phosphorous and Zinc) which are good for metal-metal contact areas such as bushings, bearings, valve train, etc. So basically, when Mobil 1 changed away from colored caps, they lowered our engine protection. Apparently it started before that back with the SJ-SL change, but the SM has taken almost all of these components out. I am still researching this, but check out this thread and this link to start with. Super Trucker... Can you get us a deal on some Diesel oil? May have to go Red Line which is all the Stealth has had in it since I got it, though they don't appear to publish their numbers... And if you can find any blue cap Mobil 1 anywhere, buy it. __________________ I am a Commodore PET --- Now get off my lawn you kids... Last edited by Dean; 2006-04-23 at 03:33 PM.