O.S. Engines 18TZ(S)-T - Manual (Page 51)

KEEP IT COOL
If you run your engine good and hot, you'll have a nice chunk of
useless aluminum in a short time.
•Running the engine hot causes the oil in the fuel to break
down and quit working. The repairs won't be cheap.
Your engine is equipped with a special heat-sink cylinder head to
make sure it gets enough cooling..
•Keep the head clean so that the dirt doesn't act like an
insulating blanket.
•Make sure that any airflow passes through the fins of the
cylinder and head.
• Make as many cutouts in the car's body as necessary, and
don't skimp on the size.
KEEP IT LUBED
Make sure you're using a fuel from a reputable, name-brand
manufacturer.
•Your fuel should have at least the amount of oil
recommended by the engine manufacturer, If you can't find
a particular recommendation on oil content, then use a fuel
with 20%-22% oil content.
•If you're trying to run a fuel with more than 20%
Nitromethane, you should add some oil to your fuel, such as
KlotzTechniplate™or Baker "AA" Castor Oil™.
KEEP IT PROPERLY
LUBED DURING
STORAGE
If you let your engine sit with nothing done to it after you last ran it,
the internal parts will start to corrode... especially the steel
crankshaft and ball bearings. They'll rust. If the fuel has castor oil
in it, it will begin to dry out and become gummy.
• Rust inside an engine will erode tight clearances and score
polished surfaces.
• Gummy fuel residue blocks oil holes in connecting rods and
crankshafts.
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