Oil Analysis

by Arnaldo Pessina in 912 / 914 Technical Questions 6 years ago

Page 2 of 3

Start
Prev
1
2
3
Next
End

Re: Oil Analysis

by Roger Lee » 6 years ago

Roger Lee

126 5.13k 4.55k

You both should be using Decalin. Almost everyone I know uses Decalin when they have to use 100LL..

http://www.aircraftspruce.com/catalog/appages/Decalin.php?clickkey=11444

p.s
Fixed typo. :lol:

Roger Lee
LSRM-A & Rotax Instructor & Rotax IRC
Tucson, AZ Ryan Airfield (KRYN)
520-349-7056 Cell

Report
Re: Oil Analysis

by Genival Pacheco » 6 years ago

Genival Pacheco

4 87 135

I agree Roger the issue is that a quarter of decalin will cost to us Brazilians something around $ 200 because of shipping and the absurd taxation that we have here.

Report
Re: Oil Analysis

by Arnaldo Pessina » 6 years ago

Arnaldo Pessina

16 16 25

Hi Roger , i was wondering if you have some data on lead of other samples in 100% AVGAS use.
At least we can compare with my sample to see if other in the same situation have same results.
Thanks,
Arnaldo

Report
Re: Oil Analysis

by Roger Lee » 6 years ago

Roger Lee

126 5.13k 4.55k

Hi Arnaldo,

I don't save any analysis. Usually the client keeps them.
I see oil analysis reports all the time. Most of my clients us 91 oct. unleaded auto fuel so they rarely see leading. The ones that I do see that use 100LL all have elevated levels of lead. Most labs use hundreds of if not thousands of samples from other same type engines and compare them to the same type engine with the same time on it. Many labs may run the sample through 3 times. If a lab sees thousands of test come through and most use 91 oct unleaded fuel then the few that come through using all 100LL will be compared to those which will have the extra lead. If someone just uses a 1-3 tank fulls of 100LL after a trip that usually uses 91 oct. unleaded and then does an oil change and an oil analysis then they might show more lead vs other times.

Roger Lee
LSRM-A & Rotax Instructor & Rotax IRC
Tucson, AZ Ryan Airfield (KRYN)
520-349-7056 Cell

Report
Re: Oil Analysis

by Bill Hertzel » 6 years ago

Bill Hertzel

13 1.95k 7.96k

Browse through the sample reports here.

https://www.blackstone-labs.com/search.php?Keywords=sample%20report

Lycoming and Continental engines burning Leaded Gas 100% of the time average 5000ppm of lead.
Automotive engines burning 0% lead average <25ppm.

Your 1400ppm Lead is a low number if you have been using 100% leaded fuel.
This might indicate that the piston seals are doing very well in keeping the combustion products out of the oil.

Your report indicates that they were expecting a number very close to Zero; typical in the modern automotive world.
Your 1400pm is flagged as high only because they are comparing an aircraft engine to their average car engine.

An elevated Lead level is to be expected and is perfectly normal if you are burning leaded gas.
You do not have a problem!

Bill Hertzel
Rotax 912is
North Ridgeville, OH, USA
Clicking the "Thank You" is Always Appreciated by Everyone.

Thank you said by: Arnaldo Pessina, RotaxOwner Admin

Report

Page 2 of 3

Start
Prev
1
2
3
Next
End

You do not have permissions to reply to this topic.

Title	Category	Replies
Ring mount, rad, oil cooler	Parts	1
914 Oil Seepage From Airbox Intake Tube	912 / 914 Technical Questions	8
New vs Old - Oil Pressure Sender	912 / 914 Technical Questions	1
OIL TEMP RISE AT MCP	915iS Technical Questions	0
engine RUMBLE, Oil pressure fluctuating	912 / 914 Technical Questions	11

Oil Analysis

Recent Videos

Safety First!

ROTALK News

Prize Giveaway!

Log In/Out

Login