1227 ppm of zinc in oil analysis

[Lhotka]

Are the results from first oil analysis cause for concern? What is considered a high zinc content? Overall evaluation was normal. I was running Delo 400 15w40 (5w30 in winter) and had 5300 miles on it before change. Have now swithced to Amsoil 5w30 HDD mainly for its cold weather qualities. What a huge difference it has made on those -20F morning starts.



Thanks for the input.

 

[illflem]

Not sure if the oil test you speak of is from the Delo or Amsoil. Zinc is an additive in petro oil that tends to concentrate in sludge, high levels are usually a result of poor sampling by taking the sample near the beginning or end of the oil drain from the pan or by scraping in sludge when running a hose down the dip stick tube. If the test was on the Amsoil it is probably due to the syn oil bringing the sludge into suspension. Either way I wouldn't worry about it, zinc levels are normally pretty high.

 

[Lhotka]

Sample was from the Delo and I probably did take it to early in the drain. I was careful about not contaminating the sample but only waited a few seconds after pulling the plug before filling the bottle. Thanks.

 

[Dreher]

To give you a reference, I use Delo 15w-40 and change at about 5000 miles, and my zinc usually reads about 1450. Sounds like it's normal.



Bob

 

[SlyBones]

In the stuff I got from Oil Analyzers, they give a sample of a report and tell you how to read it. They used 1486 in thier sample.

 

[amsoilman]

Lhotka,

Zink (Zn)is an Anti-wear, anti-oxidant, corrosion inhibitor, additive used in engine oils. Different manufactures use various amounts of this additive in the makeup of their oils. An anti-wear additive assists in the reduction of friction, wear, scuffing and scoring under boundry lubrication conditions. Boundry Lubrication is a condition in which the lubricant film becomes too thin to provide total surface seperation. A typical area in an engine where this type of lubrication would be, is the valve stems and rocker arms as there is no oil "flow" in that area. My latest oil anlysis report read 1390 PPM of Zink(Zn) with 15,000 on the oil.



Wayne

amsoilman

 

[Lhotka]

Information noted. Thanks for your replies.