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oil choice

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lbgjb10

Joined: 28 Jan 2008
Posts: 67

Posted: Fri Jul 25, 2008 12:41 pm Post subject: oil choice

any consensus on oil choices--exxon elite 15w50 aeroshell?? larry

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_________________
Larry and Gayle N104LG

Dave(at)AirCraftersLLC.co
Guest

Posted: Fri Jul 25, 2008 1:31 pm Post subject: oil choice

I've been using Aeroshell 15W-50 in just about everything lately.  In the

planes I'm familiar with, I've seen a solid 10-15 degree drop in oil temp.

And it has all the additives that Lycoming wants mixed in so you don't need

anything else.



What I really want someone else to do is run some automotive oil in an

airplane engine to see how well it works.  But I'm not man enough for that

test.



Dave Saylor

AirCrafters LLC

140 Aviation Way

Watsonville, CA 

831-722-9141

831-750-0284 CL

www.AirCraftersLLC.com

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coop85(at)cableone.net
Guest

Posted: Fri Jul 25, 2008 2:33 pm Post subject: oil choice

I'd love to see some success with automotive oil as well.  However, I heard

many years ago that auto oil had a tendency to not flow properly through the

ports in an aviation engine (smaller holes).  Anyone have any support for

that or is it just an old wives tale?  It would be curious if the newer

technologies on oil, especially synthetic, would change the answer as well.



As you said, I won't be trying it myself for sure.



Marcus

Do not archive



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Dave(at)AirCraftersLLC.co
Guest

Posted: Fri Jul 25, 2008 3:08 pm Post subject: oil choice

I remember when Mobil introduced their full synthetic for aviation a few

years back, it flopped because it did something bad to Lycs and Conts.  I

don't remember what it did, but Mobil basically whimpered away from the

market with tail between legs.



Dave



Do Not Archive



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av8or(at)cox.net
Guest

Posted: Fri Jul 25, 2008 3:33 pm Post subject: oil choice

Aviation and automotive oils are two different animals altogether.  There 

was an article in one of the avaition magazines either this month or a month 

ago about oils.  I'll try to find the article and post, but basicly, unless 

you are using a automotive engine (VW) or auto oil is the recommended oil by 

the engine manufacturer, aviation oil is the only type to use.



Sorry I can't be more specific.  After I read the article, I had a "well 

duh" type of reaction and I didn't save it.



John

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davelammers(at)mchsi.com
Guest

Posted: Fri Jul 25, 2008 3:42 pm Post subject: oil choice

There is a great article in the July 08 Sport Aviation magazine about 

aviation oils.

The short answer to these several posts about oil is that a base stock 

of pure synthetic oil will not put in suspension the products of 

combustion (ash) which are produced in an aircraft engine.

These products are far more prevalent in aircraft (than auto) engines 

because of the much greater (looser) tolerances.

Modern auto engines are much tighter and therefore see far fewer 

products of combustion blowing by the rings and therefore can go for 

lots of hours on pure synthetic.

Not so with aircraft engines. 

Dave Lammers

forever finishing



Dave Saylor wrote:



[quote]



I remember when Mobil introduced their full synthetic for aviation a few

years back, it flopped because it did something bad to Lycs and Conts.  I

don't remember what it did, but Mobil basically whimpered away from the

market with tail between legs.



Dave



Do Not Archive



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n801bh(at)netzero.com
Guest

Posted: Fri Jul 25, 2008 4:00 pm Post subject: oil choice

I have tested both oils in several motors over the years. In a Lyc or Cont you need an ashless dispersent oil  because of the elevated temps. An aircooled engine has CHT's of 400 f and the oil needs to be able to not coke over. My liquid cooled plane  loves the Amzoil 20-50 racing stuff. The problem is full sythentic oil will not carry away the lead found in 100LL and it leaves the innards a little dirty instead of keeping the lead in suspension. Petroleum oil works ok but oil temps consistantly run 15 degrees hotter.  YMMV 

do not archive

Ben Haas

N801BH

www.haaspowerair.com



-- "Marcus Cooper" <coop85(at)cableone.net> wrote:

--> RV10-List message posted by: "Marcus Cooper" <coop85(at)cableone.net>



I'd love to see some success with automotive oil as well.  However, I heard

many years ago that auto oil had a tendency to not flow properly through the

ports in an aviation engine (smaller holes).  Anyone have any support for

that or is it just an old wives tale?  It would be curious if the newer

technologies on oil, especially synthetic, would change the answer as well.



As you said, I won't be trying it myself for sure.



Marcus

Do not archive



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lbgjb10

Joined: 28 Jan 2008
Posts: 67

Posted: Fri Jul 25, 2008 5:05 pm Post subject: Re: oil choice

so if you want to use multigrade does it make difference between exxon elite or aeroshell???  what did sport aviation say??

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_________________
Larry and Gayle N104LG

rv10builder(at)bellsouth.
Guest

Posted: Sat Jul 26, 2008 6:45 am Post subject: oil choice

Sport Aviation, July 2008 (The cover is a picture of white and yellow 

Cessna 195), page 102:  Engine Oils and Additives

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