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02-16-2013, 01:09 PM
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Join Date: Feb 2009
Location: San Jose, CA
Posts: 164
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Oil Consumption Update
For those that have installed this, could you post an update on how it has affected your oil consumption?
thanks,
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02-16-2013, 08:41 PM
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Join Date: Mar 2009
Location: Plano, TX
Posts: 2,090
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I couldn't find the information on the anti-splat website. What are the inlet and outlet fitting sizes? I'm guessing 3/4" in and 5/8" out?
__________________
Colin P.
RV-6A #20603
Complete 5/10/19
PP SEL / A&P
I donate every year on my B-Day (in Dec), but donated early in Sep'19.
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02-16-2013, 11:14 PM
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Join Date: Aug 2009
Location: Redding,Ca
Posts: 633
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Quote:
Originally Posted by beav
For those that have installed this, could you post an update on how it has affected your oil consumption?
thanks,
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I think you will find little reduction in consumption. An amazingly small amount of oil makes and amazingly big mess. I installed one to keep oil off my prop. (Yeah, it's behind the engine where it belongs:-), I saw very little difference on my ~75hr engine, and I average about 10 hrs/qt. so I deduce that most of that is burned instead of blown overboard since Allan's separator seems to work probably close to 100%, at least on my install.
Good product....happy camper.
Tim
Cozy MK IV
Dues paid
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02-19-2013, 08:21 PM
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Join Date: Sep 2007
Location: WA
Posts: 988
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performance testing underway...
Check valve installed... evaluating performance impact
The photo is a bit deceiving in presenting the relative angles of things... the entry pipe is angled back 5-10 degrees and canted off center about 15 degrees pointing directly up to the separator and giving a bit better clearance... and the immersion point is back cut about 45 degrees giving a flow presentation of 35-40 degrees (ish)
__________________
Stephen
RV7 powered by a lycoming thunderbolt IO-390
turning a whirlwind HRT prop
with more hours flying than building... 2,430 on the hobbs!
ORCA Flight
Race 771
margarita!
Last edited by schristo@mac.com : 02-19-2013 at 08:26 PM.
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02-26-2013, 08:56 PM
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Join Date: Mar 2009
Location: Plano, TX
Posts: 2,090
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The other day I received a few parts that I ordered recently. Included in that was the anti-splat air/oil separator, plus some fittings and hose from Earl's performance. I came up with a solution to replace the breather hose supplied by Vans and the problem of routing the hose around the 90* oil filter adapter. I didn't want to use a 90* fitting that came on my engine. Not that there is anything wrong with the fitting, but to remove or install the fitting, the engine has to be removed from the mount (a big PITA).
From Earl's perfomance I ordered and aeroquip -12NPT to 3/4" barb 90* (full-flow) push-on hose fitting. I also ordered a 1/2" NPT to -12AN straight adapter. Earl's also sells hose for push-on fittings in large sizes so that is compatable with engine oil and combustion gasses.
I mounted the air/oil separator to the firewall backed up with a doubler to spread the load. I installed the adapter fitting in the engine and then connected the separator to the engine with 3/4" hose and the aeroquip fitting. I still need to fine-tune the clock position of the separator and trim the hose a bit (can't forget to add the clamps). I think this solution will work out pretty good. The fittings weren't all that expensive, less than $25 for both and the hose was $6 a foot, took about 8-9inches.
I ended up using a straight fitting at the oil return rather than a 90* to keep the hose clear of the battery box. If I change the clock position of the separator I might be able to change fittings.

__________________
Colin P.
RV-6A #20603
Complete 5/10/19
PP SEL / A&P
I donate every year on my B-Day (in Dec), but donated early in Sep'19.
Last edited by WingsOnWheels : 02-27-2013 at 11:09 AM.
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02-27-2013, 07:22 AM
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Join Date: Nov 2006
Location: West Chester, PA
Posts: 689
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Anxious to see your results
Stephen - Please don't forget to get back to us with your results - considering adding an oil separator too. Thanks!
__________________
Mark
RV-9A; Sold 
RV-14A; Building
2020 =VAF= donor
Last edited by MS19087 : 02-27-2013 at 07:27 AM.
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03-06-2013, 10:14 PM
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Join Date: Oct 2005
Posts: 1,516
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Oil use down
Although 11hrs/qt was a healthy oil consumption on a new engine I added my oil separator reed valve some 22 hours ago at 130 hours of engine operation.
While indications on the dip stick are less than accurate they nevertheless point to a significant reduction in oil use.
From what I can see, I am down just a little over half a quart in the 22 hours since oil change.
If I had to quantify oil on the belly, I would say, zero, zip , nada. dry and clean.
I usually measure the oil quantity that I drain at oil change to be perfectly sure what went in and what came out and how much was burned or blown out.
It's too early for that but I wanted to give a quick update on my findings.
__________________
Ernst Freitag
RV-8 finished (sold)
RV-10 Flyer 600 plus hours
Running on E10 mogas
Don't believe everything you know.
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04-15-2013, 07:49 PM
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Join Date: Sep 2007
Location: WA
Posts: 988
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Sun-n-Fun number 3...
This was the third year making the trek from Seattle to Sun-n-Fun and back.
The first time was with regular mags, second with a single P-Mag.
This year: two P-Mags, the oil-air separator, and the vacuum check valve.
For all phases of flight out and back; this year just over 6,000 miles.
Oil consumption was less than 1 quart in 15 hours (down from 1 in 8-10)
Cruise speed up 4 mph and with a slight increase in fuel burn, up .1 GPH
__________________
Stephen
RV7 powered by a lycoming thunderbolt IO-390
turning a whirlwind HRT prop
with more hours flying than building... 2,430 on the hobbs!
ORCA Flight
Race 771
margarita!
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04-15-2013, 09:21 PM
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Join Date: Sep 2006
Location: Townsend, Montana
Posts: 3,179
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Pretty good numbers, thanks.
__________________
Retired Dam guy. Life is good.
Brian, N155BKsold but bought back.
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05-02-2013, 12:47 PM
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Join Date: Sep 2007
Location: WA
Posts: 988
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Tube weld cracked out...
As an ongoing follow up on my experiences... The vacuum check valve tube into the exhaust weld totally cracked out. It is now welded back in place with a couple of side braces and a trailing gusset. Hopefully it will eliminate the moment arm vibration and last. Pretty sure that some additional bracing is required and should be addressed during the initial install.
__________________
Stephen
RV7 powered by a lycoming thunderbolt IO-390
turning a whirlwind HRT prop
with more hours flying than building... 2,430 on the hobbs!
ORCA Flight
Race 771
margarita!
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