Aeroshell 100 Plus, 50 wt Exp.Aircraft 360CI 42hrs

[flyboy52]

I'm a newbie to the forum, and was hoping for a little insight on oil analysis interpretation.
I built an experimental aircraft with a 360 CI fuel injected 4 cyl air cooled aircraft engine. It was broke in using straight mineral oil to seat the rings for the the first 48 hrs, then changed to the additive containing Aeroshell 100 plus oil. After 42 additional hours I changed the oil, and sent a sample of this oil for analysis to Polaris Labs, and got the results back showing a high amount of lead.
Since this engine is run on 100 octane leaded aviation fuel, I would expect there to be lead, but I was wondering if anyone in the forum would know what the normal amount would be, and for that matter what the norms would be for all the wear metals, contaminant metals, multi source metals, and additive metals ?

Thanks!

 

[wwillson]

How do you lean the engine in climb and in cruise? I have had trouble with leading plugs in certain Lycoming engines until a mechanic with 50 years of turning wrenches schooled me on how to lean. Of course there are many methods/opinions on leaning, but what he taught me worked well.

Wayne

 

[flyboy52]

I really haven't been leaning in climb, since it is normally at power levels above 75%. In cruise at power levels at 75% or less, I have been leaning to 50 degrees lean of peak on the leanest cylinder. I have all 4 cyl. monitored for EGT's and CHT's, and when the leanest is -50, the richest is usually at -25 to -35. Didn't see much in the way of lead dspoits on my plugs when I checked them at 92 hrs total time at the oil change. I would be interested in the leaning technique your mechanic told you about, especially in climb.
Thanks

 

[flyboy52]

Wayne,

I did a search in the forum, and did find the oil analysis report from a Piper with an 0-540 engine. The results showed a lead level range very consistent with mine, so it looks like I'm probably fine.
I would still like to see what are considered the norms, and the leaning info you have though.

Thanks!

 

[lazaro]

cold start with this oil cant be very good for metal parts inside a cold engine, I would be looking for better quality oil.
can you post up the oil sample?

 

[Steve S]

Av gas is leaded.

 

[Drew99GT]

Originally Posted By: flyboy52

Since this engine is run on 100 octane leaded aviation fuel


Earth to Steve........Earth to Steve............come in please!

 

[Steve S]

Originally Posted By: Drew99GT
Originally Posted By: flyboy52

Since this engine is run on 100 octane leaded aviation fuel


Earth to Steve........Earth to Steve............come in please!
You sound just like my wife!

 

[Gary Allan]

Watch out, Drew!! Steve's getting "that way" agin

 

[wapacz]

The aviation section may be more helpful. Though it gets less traffic.

 

[MolaKule]

I recommend Dyson Analysis; he's seen them all.

 

[flyboy52]

Originally Posted By: wapacz
The aviation section may be more helpful. Though it gets less traffic.


Thanks!
Good idea. Like I said, I'm a newbie, and I saw the oil analysis forum first, and didn't even get as far as the aviation section. I'll try posting over there too.