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10-19-2012, 11:06 AM
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Join Date: Jan 2005
Location: Battle Ground, Washington
Posts: 138
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5 1/2 works best for me
My IO-360 M1 does best at about 5.5 quarts. I add one when it gets down to about 4.5. It seems to use a quart about every 15 hours.
Dan Miller
RV-8 Superior IO-360 M1. 1200+ hours
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10-19-2012, 11:19 AM
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Join Date: Mar 2005
Location: Molalla, Oregon (KOL05)
Posts: 529
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Test the theory...
JJ,
I target 5 - 5.5 Qts on the stick and the belly sees only a small amount. (The smoke system serves to clean that off everytime it's used...  ) If I'm doing long X-country work, I'll fill it to 6. For folks in hotter climates or who are running the IO-360-A* 200 HP angle valve motors, you may want to run a slightly higher level to counteract the higher oil temps. The piston squirts on those engines use the oil as an additional cooling medium.
I recently ran a test on my IO-320-D1A to determine if the oil was being blown or burnt. I rigged up a small catch can with a shorter breather line to collect anything that was going overboard. Filled the oil to 6 qts, and then flew for 1 hour. The amount of oil that was collected was less than half of a thimblefull. Suprisingly not that much. So it meant that my increased consumption (1qt/5 hrs) was probably being burnt. With that and all of the other evidence collected, the cylinders are coming off for inspection and a TOH. Here's a pic of the Hi-Tech collection system...

__________________
Joe Blank
RV-6
IO-320-D1A
Advanced Flight Systems
Van's Aircraft Inc. Technical Support-Retired
EAA Tech Counselor & Flight Advisor
www.westcoastravens.com
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10-19-2012, 11:30 AM
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Senior Curmudgeon
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,420
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I love the duct tape 
__________________
Mike Starkey
VAF 909
Rv-10, N210LM.
Flying as of 12/4/2010
Phase 1 done, 2/4/2011 
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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10-19-2012, 11:36 AM
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Join Date: Feb 2006
Location: Keller, Texas
Posts: 309
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5 1/2 quarts for the 0-320
__________________
Nigel
RV9A-N113SQ
52F
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10-19-2012, 12:13 PM
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Join Date: Oct 2008
Location: Lake Country, B.C. Canada
Posts: 2,416
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0-320 RV-9a
I run mine between 6 and 7, with almost nothing ever on the belly. On a x-country I topped up to 7.5 and blew a part of that out.
do I recall..... Lyc. says to run with no more than 8, and no less than TWO?
what they heck kind of advice is that?
are the guys blowing or burning more running at higher rpm, or banking more than 20 degrees?
what's the diff?
__________________
Perry Y.
RV-9a - SOLD!....
Lake Country, BC
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10-19-2012, 12:36 PM
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Join Date: Mar 2006
Location: Newport, TN
Posts: 7,496
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Quote:
Originally Posted by Joe Blank
I recently ran a test on my IO-320-D1A to determine if the oil was being blown or burnt. I rigged up a small catch can with a shorter breather line to collect anything that was going overboard. Filled the oil to 6 qts, and then flew for 1 hour. The amount of oil that was collected was less than half of a thimblefull. Suprisingly not that much. So it meant that my increased consumption (1qt/5 hrs) was probably being burnt. With that and all of the other evidence collected, the cylinders are coming off for inspection and a TOH. Here's a pic of the Hi-Tech collection system...

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I know that how the vent tube is positioned can have a big effect on how much oil is sucked or blown out. In my case, if I go above 6 I get raw oil on the belly and it drips out of the tube afterwards. This makes me believe that I am not burning it.
My tube extends down and back between the exhaust pipes and sticks about an inch past the cowl. I have a 1/4" hole drilled in the tube about 5" up from the end. Not sure if my setup is optimal for reducing the amount that is blown/sucked out. A buddy of mine had his per the plans/manual basically dumping out right on an exhaust pipe. This led to a nasty brown residue on everything under the cowl and on the firewall so I decided not to follow his setup. He ended up changing his to something different after cleaning up the mess.
Wonder if the fact that you had that tube in a cup with no suction/pressure on it that it skewed your results?
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10-19-2012, 12:44 PM
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Join Date: Jun 2005
Location: Cypress TX
Posts: 120
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O-360
5 1/2 quarts is the magic number for my O-360 A1* with dual P-mags. Any more just ends up being cleaned off the belly. 1 quart every 10-12hrs.
__________________
Jim K
Cypress, TX (T51)
RV 7A-
O-360-Dual P mags-GRT EFIS-Tru-Trak AutoPilot
Flying as of 9/7/08
Finally painted 2/8/13
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10-19-2012, 02:52 PM
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Join Date: Jul 2007
Location: Delta, CO/Atlin, BC
Posts: 2,391
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Same Superior engine in mine is happiest at 5-6 quarts. Start around 6 and add a quart when it gets to 5 (takes ~25 hours).
Greg
__________________
Greg Arehart
RV-9B (Big tires) Tipup @AJZ or CYSQ
N 7965A
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10-19-2012, 04:16 PM
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Join Date: Mar 2012
Location: S?o Paulo - Brazil
Posts: 13
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Very happy with this thread, above 6 qrtrs it spits outs the extra oil, seems to be happy at 5 1/2, although manual says minimum is 6, Lycoming IO360 M1B. Flying over the Caribbean & Amazon, I did waste some oil trying to keep it at 7qrts, couldn't risk it.
__________________
Thomas
RV7 Driver Only
VAF donation valid May 28, 2013
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10-20-2012, 06:43 AM
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Join Date: May 2007
Location: St. Helens OR
Posts: 429
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I was happy at 6
usually let it get down to 5 before dumping another one in. Having seen this post I might let it down to 4 1/2. I am running a Narrow Deck 0-360 with chrome cylinders burning/puking around a quart every 7 hours.
Randy
8A
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