Hi Paul,

    I see Tracy told you about his "Oil producing" engine.  He swore

me

to

secrecy as I am certain he though he would catch unmerciful ribbing

from

you

if he went on the list claiming his engine was producing oil {:>).

I

have

noticed my oil level never decreases and may even be slightly

increasing.  I

guess if you went long enough between oil changes you could get to

the

point

that the lubricating oil in the crankcase might get too diluted with

the

2

cycle oil to provide good protection.  But, at my rate of oil level

increase

oil change will come long before than happens. Another bonus point

for

the

rotary?{:>).

Ed

I would not worry too much about it. Regular motor oil has high

pressure

"secondary lubrication" additives mainly for rubbing wear such as cam

shafts,

lifters  and valve stems that are not needed in a rotary. Zinc and

phosphor come

to mind.  When burnt I suspect these are what cause most of the gunk

on

the rotors.

Paul Lamar

Paul, my Ross drive needs that secondary lubrication. Tip. motorcycle

oils

contain more phosphates than car oils for extreme pressure lubrication
Phosphates are bad news for catalytic converters in cars.
I am using Mobil 1 plus a teflon additive. My rotary does not 'produce

oil'

Happy flying
Ian RV6A Down under.

Good point Ian. I forgot about the gear box.

Paul Lamar

The "oil production" in my engine is a function of how much oil I put in the
fuel.  I had been slowly increasing the amount figuring it was just good
insurance.  When I got to around 6.5 - 7 oz per 5 gal. of fuel I could
notice the increase in oil level when I got to around the 35 hour mark.  By
70 hours (I change oil at 50 - 70 hour intervals) I was almost a quart over
full.  When I finally figured out what was happening I dropped back to 5 oz
per 5 gal. can of fuel.  At this rate I can barely see that the level is up
at oil change time.  Wouldn't have noticed it if I wasn't looking.

The main conclusion I came to was that 1 oz per gallon was the right mixture
to use.

I use Mobil 1 in the engine for the same reason Ian mentioned -  the gears
in the redrive are much happier with the better shear strength of synthetic
oil.  Good for the engine too.

Tracy Crook
tcrook@rotaryaviation.com
www.rotaryaviation.com

About  two years ago we did some 500 degree F bake test on different oils
and Mobil 1 came out tops on all auto engine oil we tested.

Paul Lamar
 
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