Motorcycle Mobil 1 Trisynth

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Jun 11, 2002
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The Dirty South
I posted this to the old server long ago. Here
it is again for your entertainment:

Mobil 1 (API SJ tri-synth) 15w-50 for 3k miles in
a 2000 KLR650 (water-cooled combined transmission
single-cylinder with wet clutch). This oil saw a
lot of abuse. Lots of clutch slippage on some
tough technical off-road rides. It was also
subjected to several wide-open-throttle freeway
blasts in the desert heat. Bike had about 12k
miles at the time.

Lab was OAI.
-----------
code:

Water:
Fuel:
Viscosity@40C: (Not tested)

Viscosity@100C: 13.3cSt

% Solids: Trace

Soot: NA

% Oxidation: 18.9

% Nitration: 17.1

TBN: 5.6


Spectrographic Analysis
----------------------

code:

Iron: 29ppm

Chromium: 1ppm

Lead: 2ppm

Copper: 24ppm

Tin: 2ppm

Aluminum: 42ppm

Nickel: 0ppm

Silver: 0ppm

Manganese: 6ppm

Silicon: 11ppm
isn't so bad after all.

Boron: 52ppm

Sodium: 4ppm

Magnesium: 958ppm

Calcium: 898ppm

Barium: 0ppm

Phosphorus: 805ppm

Zinc: 104ppm

Molybdenum: 6ppm

Titanium: 0ppm

Vanadium: 0ppm

Cadmium: 0ppm


Where did all the zinc
go?
gr_eek2.gif


[ January 14, 2003, 07:09 AM: Message edited by: BOBISTHEOILGUY ]
 
Yes, that zinc level looks awfully low. I believe that Tri-Syn's barrier protection was marginal ... and nothing in this test leads me to believe I was mistaken on that point.
rolleyes.gif


I've heard that the heavier weights of oil were spared the dramatic reductions in ZDDP and other metallic barrier additives. but, this level isn't encouraging. It seems to have started out low ... and then was depleted by the gearbox ... which still showed a lot of wear, regardless.
rolleyes.gif


In another thread in the motorcycle section, I said a level of 19ppms of iron wasn't that great. I rescinded that assessment upon further review.
blush.gif


These results, however, really don't look so hot.

Can all that aluminum be coming from the case? Why so much copper ... but low lead and tin?
confused.gif


And, I really thought that base oil would have held up better. A test (admittedly dated) on Red Line's site showed this oil (weight) to be very stable in that regard.
dunno.gif


--- Bror Jace
 
I have no idea what the zinc content in Mobil 1 15W50 Tri-Synthetic was. I had seen the lighter weights listing ZDDP as 0.75% ... which should be 750ppms (unless my quick math skills have failed me).

--- Bror Jace
 
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