Lycoming IO360-C1C6, 47hr AeroShell 15w50, 100SMOH

[cheetahdriver]

this is the first run of regular (non-break-in) oil on my IO360-C1C6. as the engine still only has 100 hrs on it, i am not real worried about the silicon (although my A&P is checking the induction system).

Code:




Oil Filter--------champion

OIL AeroShell 15w50

hr IN USE ------ 47

MI/HR-ON-UNIT----- 100



ALUMINUM---------- 9

CHROMIUM---------- 5

IRON-------------- 22

COPPER------------ 31

LEAD-------------- 4439

TIN--------------- 2

MOLYBDENUM-------- 1

NICKEL------------ 2

MANGANESE--------- 0

SILVER------------ 0

TITANIUM---------- 0

POTASSIUM--------- 1

BORON------------- 2

SILICON----------- 15

SODIUM------------ 2

CALCIUM----------- 3

MAGNESIUM--------- 6

PHOSPHORUS-------- 927

ZINC-------------- 7

BARIUM------------ 0



SUS-VIS@210F------ 90.6

cSt-VIS@100c------ 18.13

FLASHPOINT-IN-F--- 455

FUEL%-------------
ANTIFREEZE%-------

WATER%------------ 0.0

INSOLUBLES%------- 0.3

TBN---------------


Originally Posted By: Blackstone
Tin, nickel, and insolubles all settled down nicely for you, and if you could get copper and silicon to do the same, we could give your engine a clean bill of health. As it is, things don't really look bad at all.
Most of the excess copper is due to the use of Aeroshell 15W/50, and switching to a different type of oil
should take care of that. Silicon may be harmless as well if you use any DOW-4 around the oil filter gasket.
If not, check the air filter/induction system for any problems. Also check the oil filter for metal just to be on
the safe side on copper and resample in 45-50 hrs.


application is the HyperCheetah, a modified Grumman Cheetah, with the IO360 and a C/S prop. the first time around the rebuilt cylinders on this engine lost all the crosshatching in 150 hrs. this time around we have Lycoming new nitrided cylinders.

 

[2oldtommy]

Is all that lead due to 130 octane Avgas? Oldtommy

 

[cheetahdriver]

yes, a sizable component of bearing material in these engines is silver, of which there is none in this sample...

 

[fdcg27]

Originally Posted By: cheetahdriver
yes, a sizable component of bearing material in these engines is silver, of which there is none in this sample...

Surely you are using 100LL?
Does 130 even exist anymore?

 

[cheetahdriver]

just as the "rest of the story", while doing the annual this month, my A&P found a defective cable clamp on the alternate air door actuator. net result was that the door was opening once the engine was started, bypassing the air filter. a second sample was pulled this time, which should also have high silicon, but the sample of the current oil should trend down.

blackstone called it in one...

 

[casper]

Cheetah,

looks good man...[censored] any lycoming you have is essentially bulletproof. Keep her flying and keep us updated.