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Maintenance & Repair Fuel and Oil Additives
1246 messages, Last post on Sep 28, 2009 at 7:37 AM
You are in the Maintenance & Repair Forum. Your Host is mr_shiftright
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The oil engineer I've chatted with remarked that zinc and phosphorus were commonly used oil anti-wear additives, but have been replaced in recent years by other additives. He did not detail what those other additives were. Zddplus sounds like a very specialized product for older cars not having cat converters. One of the SAE articles they quoted was printed in 1977, which was back when cat converters were in their infancy. The site warns about not using Zddplus in cars with cat converters: Why should ZDDPlus™ not be used in OBD [On Board Diagnostic] cars? The key ingredient of ZDDPlus™ is ZDDP, which has been known to shorten catalytic converter life. Manufacturers have been redesigning engines for the last decade to minimize the need for ZDDP, in order to lower emission levels. One method is switching over to roller rockers. |
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Replying to: euphonium (Jul 02, 2009 9:49 am) |
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Replying to: euphonium (Jul 02, 2009 9:49 am) Anyway, you want peace of mind? You can just use SJ or SL, plus CH-4, type oils. That's all you'll ever need IMO. Here's a nice list I found: 1. Castrol RX Super 15w40 2. Chevron Delo 400 15w40 3. Mobil Delvac 1300 Super 15w40 4. Pennzoil Long-Life 15w40 5. Quaker State 4X4 Synthetic Blend 15w40 6. Shell Rotella-T 15w40 7. SuperTech 2000 (WalMart) 15w40 8. Valvoline All Fleet 15w40 9. Castrol Syntec Blend Truck and 4X4 15w40 I believe ZDDPlus has everything in it they claim it has, so it is not being misrepresented as per content (which is what their "lab tests" are saying---not that it "works"). But it looks to me, from what I've been reading, that ZDDPlus is a cure in search of a problem. I don't have to prove that ZDDPlus prevents flat tappet wear---THEY have to prove that modern oils cause it --- and they haven't. Their ads are full of "argument by assertion", which claims that lots of flat tappet engines are showing wear, but wear is the evidence? NADA. I'm ready to see it, bring it on. I want bench-tested vintage engines, side by side, newly rebuilt, 10 with regular modern oil, 10 with ZDDPlus, run 'em for 50000 miles and show me.
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An analysis of engine oil in my XT Forester at 3000 miles revealed the main additives were calcium, phosphorus, zinc, and molybdenum. A tiny bit of boron, silicon and iron were also there. Everything else in trace amounts. The oil is Chevron 5w30 (I do not know AP rating but assume it's match for the Turbo engine as Subaru recommended it). Only additive is ASL Camguard. Happily, the oil had little soot and no water/gas contamination. I did the analysis because some folks have had major XT engine failure around this mileage - this engine seems ok.
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Replying to: kurtamaxxxguy (Sep 25, 2009 5:17 pm)
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Replying to: Mr_Shiftright (Jul 02, 2009 5:07 pm) Most of us know the additives,for all intent will not get you much and if they did then why use oil,Put in one can STP,Prolong,Z-Max, Teflon junk?,one can of whatever Wal-Mart has on the Red tag close out,and just a touch of Marvel mystery oil,Weld her shut and Drive anyway you want,it just won't wear out or break!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!- - !!!!!!!!!!!!!!!!!!!!!!!! Always research,get the facts,then look for double blind tests,and when you find them,see what Governmental agency recommends them and you just might have something there! Good luck Guys with additives, Mike C |
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| Hey Guys, This is a long thread,since Sept. 01 Need a cake with a burning bottle of fuel additive on top!!!!!!!!!! MC | |
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Replying to: Mr_Shiftright (Sep 26, 2009 7:12 am) There was one recall early in the '09 model year, then various reports on Subaru forums. Seemed prudent to check the oil at least once just to be sure. 
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Replying to: kurtamaxxxguy (Sep 27, 2009 9:54 pm) |
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