The original Slick-50 (pre 1984) formula is now sold
under the name Xcelplus.
Q Is it true that Xcelplus is the original
A Yes. In 1983 John Bishop the inventor
discontinued the supply of the formula to Petrolon who marketed
Q Can the manufacturers of the new Slick-50
formula quote tests done with the original Slick-50 formula?
A No. The Slick-50 settlement with the FTC
(Federal Trade Commission) prohibits Slick-50 from making claims that rely on
the original Slick-50 tests.
Q Can Xcelplus quote tests done under the
A Yes... for any test done with the original (pre 1984) Slick-50 formula.
Q What other names has Xcelplus been marketed
under, when were they available and where?
A Click to view Trademarks
used to market Xcelplus
Q What is the difference between Xcelplus and
A Xcelplus is a LONG LASTING treatment (160,000 km between
Xcelplus has been TESTED extensively.
Tests are PROVIDED on the web site.
Q Do you have a picture of the PFL (Permanently
Fused Layer) coating?
A Yes in the Tests section (Franklin Institute and NASA)
Q Are Xcelplus claims substantiated?
A Yes. There are tests by independent laboratories, consumer and
government organisations: Look in the tests section.
Q How can I test it's working?
A Do some DIY tests
Q Is Xcelplus an "oil additive"?
A No. Xcelplus is a "Metal treatment" and "Boundary Lubricant". It treats the
metal not the oil and prevents metal
to metal contact.
Q Does Xcelplus contain PTFE (Poly Tetra Fluoro
Q Is PTFE the active ingredient?
A No. The manufacturer (Petrolon) says it is not and so do
Q Is Xcelplus compatible with all metals?
Q Will Xcelplus void your warranty?
A No Xcelplus will not void the manufacturers warranty.
Engine Treatment (Concentrate)
Q How is Xcelplus applied?
A The treatment is added to the oil.
Q What kinds of engines can be
A Petrol, diesel, alcohol, gas, nitrous, turbo, supercharged,
carburettor, fuel injected, direct injected, etc... Do not use in 2-stroke and
aircraft engines: These have special treatments designed for them.
Q How often should an engine be
A Retreat after 160,000 km. This ensures the coating remains optimal
N.B. If an engine is
rebuilt, parts are changed or mechanically abraded these parts will need to be
Q How long does the coating last?
A 160,000 km
Q Can the coating last for more than 160,000 km?
A Yes. However to ensure full protection we recommend retreating at
Q How long does it take Xcelplus to treat the
A The length of an oil change is ideal. It is recommended that the oil is not changed for at least
The longer Xcelplus is in the longer
it has to treat the metal. This is especially important in dirty engines where
the metal has to be cleaned/prepared so the treatment can bond to the surface.
Q How quickly can the effect of
Xcelplus on an engine be noticed?
A It starts treating as soon as you add it to the engine. The worse the
engine typically the faster you notice it working.
Q Can I split my treatment across two or more oil
A Yes. A very dirty engine or an engine where the oil is changed very
often would benefit from this approach.
Q How much will one bottle of
A One bottle of Xcelplus treats an engine
capacity of 7 L (not oil capacity)
Q Can you put less Xcelplus in smaller engines?
A Yes. Roughly pro-rata e.g. A 3.5 L engine would require only half a
Q Does it matter how much oil is
in the engine?
A No. Xcelplus treats the metal not the oil. Treatment is based on the
size of the engine (combustion chamber volume) not the oil volume.
Q Is over-treating an engine with Xcelplus
A No. Xcelplus only coats to 1-2 microns thickness then stops. Any excess
will be flushed out with the oil change.
Q If you apply the recommended amount of Xcelplus
is there any chance you will under-treat your engine?
A No. The recommended amount should be more than sufficient to treat any
engine up to 7 L engine capacity.
Q Will Xcelplus make the wet clutch in my
A No. The fibre plates remain uncoated and do not slip even though the
metal separator plates are coated.
Q Is Xcelplus compatible with synthetic, mineral,
graphite, castor and ester (vegetable) based oils?
A Yes. Xcelplus is non-polar and thus will dissolve in any non-polar
solvents (oils). It does not dissolve in polar solvents (alcohols).
Xcelplus will not change the properties
of the oil it is in. That is why it is compatible with API SF, SG, SH / CD, CD2,
CE, Caterpillar TO2, Cummins NTC400, Allison C3, Mack EDK2, MIL L46152 C & D,
MIL L2104 E & D
Q Is it better to treat an old car or a new car
A new car gets the benefit of reduced wear (lasts longer).
An old car often shows the greatest improvements e.g. economy, noise,
temperature, vibration, compression, power, responsiveness, etc...
Q Should you treat a brand new vehicle with Xcelplus?
A No. You should wait until the car is run in. Xcelplus will almost stop
the wear-in process.
Q When is the engine run in?
A Usually after about 10,000 Km. However please check with your mechanic
as run-in distances vary.
Q Will Xcelplus help a smoking vehicle?
A Yes. Xcelplus removes varnish and helps the rings move more freely in
the piston so they seal better. N.B. Xcelplus does not replace metal or fix worn
Q Will Xcelplus increase compression?
A Yes. Xcelplus removes varnish and helps the rings to move more freely
in the piston/cylinder so they seal better: compression evens out across all
cylinders N.B. Xcelplus can not fix broken rings, replace missing metal or fix
Q Can I use my favourite oil with Xcelplus?
A Yes. Xcelplus does not change the performance of an oil.
Q How can I tell if Xcelplus is compatible with
A Put a small amount of Xcelplus and your oil together and see if they
mix. If they sediment or separate then they are not compatible.
Q Can you use oil additives after adding Xcelplus?
A Yes. Oil additives be safely used after Xcelplus treatment.
Q Can oil additives be used during Xcelplus treatment?
A No. The oil additives may interfere with the treatment process. N.B.
Most oil additives will not affect the treatment process but it is preferable
not to use them for one oil change just to be certain.
Q What effect does using Xcelplus have on oil or oil additives?
A Oils and oil additives last longer and work better
Q Can you extend the oil change intervals when using Xcelplus?
A No. We recommend maintaining manufacturer specified oil change
Q How long does it take for the savings with
Xcelplus to pay back the cost of the product?
A If your mileage was to increase by 10 % it would take you $1,000 of fuel
to pay the cost of the bottle. Other savings also occur. The value of these
other savings (like longer engine life, greater reliability and protection from
seizing) easily exceed the improvement in economy so payback occurs virtually as
soon as it is added.
Q How much do you save at the pump by using
A Savings vary primarily according to the vehicle, driving style, age of
vehicle, petrol price, etc... e.g. A 10 % improvement in efficiency would be the
equivalent to saving $10 for every $100 of petrol
Q Should the bottle be shaken
before adding Xcelplus?
A It is not necessary to shake the bottle. Xcelplus remains in suspension
Q Can I run my engine without oil after treating
A We do not recommend running without oil: Oil helps remove
heat/contaminants and decreases impact forces. Tests running without oil are
only to demonstrate that Xcelplus adds an extra level of protection in excess of that provided by oil or oil
Q Can Xcelplus be used in hydraulics?
A Yes. Hydraulic oils are normally non-polar. Xcelplus is soluble in a
non-polar hydraulic oil N.B. Use the gear treatment if gears are present.
Q Can Xcelplus be used in brake fluid
A No. Brake fluid is highly polar and the Xcelplus is non-polar: the
product will not dissolve.
Q Can Xcelplus be used in water?
A No. Water is polar and Xcelplus is non-polar. Unlike substances do not
dissolve in each other.
Q Will painting Xcelplus onto a surface work?
A Yes. Xcelplus will coat but in the absence of heat and pressure it will
be very slow.
Q Is the Engine treatment subject to evaporation?
A No. It contains a paraffin which is extremely heat resistant.
Q Will centrifugal filtration stop Xcelplus from working?
A We recommend that you change back to standard filtration for one oil
Q What is the most unexpected result from treating something with
A A worn (~10,000kms) OEM 520 (light) motorcycle chain on a Yamaha XT600
was treated by adding a small amount (~1 ml) of Xcelplus to the chain oil (using
a Scottoiler). Chain life increased from ~12,000 Km to 57,777 Km (a saving of
~$1,200 in parts)
Q Is there anywhere you shouldn't put Xcelplus?
A Do not use it in automatic transmissions (including CVT's), centrifugal
clutches, new engines and anywhere where metal to metal friction is required.
Q What is the typical wear reduction in an engine?
A Engines typically show a ~50 % reduction in wear
Gear Treatment (Concentrate)
Q How much Xcelplus Gear Treatment should you use?
A Add 10 % of the oil volume
Q Can you use Xcelplus Gear Treatment in Limited Slip Differentials?
Q Can you treat an automatic
transmission e.g. CVT (Continuously Variable Transmission) or centrifugal clutch with Xcelplus
A No. It MAY cause slippage.
Q Can you treat differentials, gear boxes and
other parts with Xcelplus Gear Treatment?
A Yes. Virtually anything which uses oil as a lubricant can have Xcelplus
added to it N.B. It should NOT be used in automatic transmissions (including CVT's)
or centrifugal clutches as it MAY cause slippage.
2-stroke Treatment & Upper Cylinder
Q How is the Xcelplus 2 Stroke Treatment added?
A Add it to the oil reservoir of the oil injector system.
Q How much Xcelplus 2-stroke Treatment is required to treat a large 2-stroke engine e.g.
A 750cc motorcycle or outboard motor?
A One 50 mL bottle.
Q Does the Xcelplus 2-Stroke Treatment last as long as the
A No. The temperatures in the combustion chamber can be as high as 1100˚C
at the valve seats and this decreases the life of the treatment: Remember to
re-treat if new parts are added N.B. Honed or machined parts will lose their
coats and must be retreated.
Q Why is the Xcelplus 2-Stroke Treatment also called an
"Upper cylinder lubricant"
A Because it can be used in 4-stroke engines as well where it lubricates
the upper cylinder.
Q Can the Xcelplus 2-stroke
Treatment be added via the carburettor?
Q Is the Xcelplus 2-Stroke Treatment compatible with model aircraft fuel?
A No. The methanol used in model aircraft fuels is polar and the 2-Stroke
is non-polar: The product will sediment.
Q Can the Xcelplus 2-stroke Treatment be used to treat
model aircraft engines?
A Yes. Try adding a small amount via the air intake to avoid
Q How do you know the Xcelplus 2-stroke Treatment is working?
A Usually the RPM's increase
Q What is the most unexpected result of treating with 2-Stroke
A Pinging in single cylinder air cooled 4-stroke motorcycles decreased or
Q How is the lubricant best applied?
A You can use a spray nozzle, a brush, a stick or a dropper: Only a small
amount is required for most applications.
Q How long does the lubricant last?
A It depends on the application. It has a residual effect and lasts a
long time. However it does not use the pfl technology
(which lasts even longer) N.B. Try to avoid hot places and leaving the lid off to minimise evaporation of
the light solvent carrier.
Q Where is the lubricant most effective?
A Anywhere a small metal surface has a friction problem
Q Does the lubricant work on heavy metal surfaces
or surfaces with large loads?
A If you have very large heavy surfaces or surfaces with large loads the
Xcelplus grease is a better choice.
Q Where do "you" find the lubricant works best?
A Locks and hinges. Especially locks made from cheap porous metals...
which normally need repeated lubrication to keep working. It has an amazing
penetrating ability and once in it lubricates and keeps working for very long
periods of time.
Q What is the most unusual application you have
found for the lubricant?
A The solenoids, pushrods, plunger and other moving parts on a pinball
machine were sticking and required regular lubrication. One treatment with
a very small amount of the lubricant solved all the sticking problems and lasted
over 2 years.
Q How does the Aircraft Treatment differ from the
A It is not as concentrated (to optimise treatment)
Q What kinds of aircraft engines does it treat?
A Piston engines up to 736 kW (1,000 HP)
Q Is it FAA accepted?
Q How much is added to the aircraft engine oil?
A Use a ratio of 1:5 (17 %)
Q How often should you re-treat?
A Every 300 hours: to ensure optimum protection and performance
Q What is Sludge Out used for?
A For cleaning dirty engines
Q How long is Sludge Out left in the engine?
A 25-40 km: It is applied just before doing an oil change
Q Is there anything else we can do before treating
with Xcelplus Engine Treatment?
A Add Ring Free for one oil change before treating with Xcelplus Engine
Q What is Ring Free used for?
A To improve the performance of crankcase oils, to clean the engine and
free up the rings
Q When should Ring Free be applied?
A After cleaning the Engine with Sludge Out.
One oil change before treating with Xcelplus Engine Treatment.
Q If the Xcelplus Engine Treatment has already been
applied is it worth adding Ring Free?
A Yes. The performance of crankcase oils is improved and further sludge
will be removed.
Q Is Ring Free a metal treatment like the Xcelplus
A No. It is an oil treatment. Oil treatments are flushed out when you
change the oil
Q What happens when you treat parts like bearings
with the Xcelplus grease?
A The parts last longer and require greasing less often (saves lots of
work): This also means less grease is required.
Q How can I tell the Xcelplus grease is working?
A Usually it is possible to notice a decrease in rolling resistance after
a short run-in e.g. Try rolling down a hill after you grease all the wheel
N.B. If you have an unusual application and you're not
sure please ask us.