Test results attached, note that XX indicates breakdown,
  the load indicated has to be multiplied by 6.
  We did the used cooking for a laugh!! Please don't
  accuse me of recommending its use as an engine
  lubricant, although it is a great diesel fuel.

  We found it necessary to do our own tests as I
  could not access any information giving an objective
  comparison. I guess some hackles will be raised by
  the relatively poor performance of Mobil 1, perhaps
  it has some other highly desirable qualities.

  John Evans

  I think we are missing something here. Probably oil
  temperature. Used cooking oil looks as good as the
  best synthetics :) Somehow I doubt that :)

  Paul Lamar

  John evans,  For the purpose of evaluating the test
data it would be nice to know how the time at each
load step was kept the same for each product since
it would affect the temperature rise of the oil and effect viscosity.

George grimes

                       

George Grimes, thanks for your comments, I'm sure there are plenty of
ways what we did can be criticized by "armchair experts", but let me
point out that we were simply looking for an answer to our question "how
does the film strength of a good 2 stroke oil compare with ATF?" Of
course we got a bit carried away and checked a few oils we had at hand.
The sample of Agoil was extracted from Colin's car by the dipstick! As
our interest was related to use in a gearbox rotary engine range
temperatures did not seem relevant. The only time temperature seemed
relevant was when the film broke down and it started to smoke.

It can be argued that a  better method could involve immersing the test
area in the oil rather than just applying a few drops.

There was no rigid control of the time each sample was under load,
subjectively the time intervals were much the same, and prior to the
breakdown load time did not seem to matter.

Despite our easily criticized methods we were impressed by the
consistent repeatability of the tests. These results were in line with
those published in "Commodore " Magazine  some time ago, which gave
Mobil 1 a relatively poor score compared with Valvoline Durablend.

As stated previously it is common practice in Australia to run rotary
engines on 2 stroke oil. One of my patients was a winner at Bathurst in
an RX7 Using BP  2 stroke oil in the sump.

We will be delighted to see an attempt to confirm/ debunk our findings!

John Evans