The original Slick-50 (pre 1984) formula is now sold under the name Xcelplus.

Q Is it true that Xcelplus is the original Slick-50 formula?
A Yes. In 1983 John Bishop the inventor discontinued the supply of  the formula to Petrolon who marketed Slick-50.

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 Slick-50 name?
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 it's competitors?
A Xcelplus is a LONG LASTING treatment (160,000 km between treatments).
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 Ethylene)?
A Yes.

Q Is PTFE the active ingredient?
A No. The manufacturer (Petrolon) says it is not and so do Dupont.

Q Is Xcelplus compatible with all metals?
A Yes

Q Will Xcelplus void your warranty?
A No Xcelplus will not void the manufacturers warranty.

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 easily exceed the improvement in economy i.e. longer engine life, greater reliability, reduced emissions (CO2, CO, hydrocarbon, etc...), protection against seizing, improved oil quality and time savings. Thus payback occurs virtually as soon as Xcelplus is added. Read the Cost Benefit Analysis for more details.

Q How much do you save at the pump by using Xcelplus?
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


Engine Treatment (Concentrate)

Q How is Xcelplus applied?
A The treatment is added to the oil.

Q What kinds of engines can be treated?
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 treated?
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 retreated.

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 160,000 km.

Q How long does it take Xcelplus to treat the engine?
A The length of an oil change is ideal. It is recommended that the oil is not changed for at least 8,000 Km. 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?
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 changes?
A Yes. A very dirty engine or an engine where the oil is changed very often may benefit from this approach.

Q Is an oil change essential before treating?
A No. The treatment will work even if the oil is dirty. You can also put in 1/2 the treatment now and the other half later.

Q How much will one bottle of Xcelplus treat?
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 bottle.

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 dangerous?
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 motorcycle slip?
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 with Xcelplus?
A Both.
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 10,000 Km is sufficient to run in most engines. However run-in distances vary so please check your service manual e.g. Small engines are usually run in sooner

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 seals.

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 seals.

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 something?
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 intervals

Q Should the bottle be shaken before adding Xcelplus?
A No. Xcelplus does not require shaking to remain in suspension.

Q Can I run my engine without oil after treating with Xcelplus?
Running without oil is not recommended: 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 additives.

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 change.

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 Engine testing shows a 60-80 % reduction in wear. This is equivalent to a 2.5-5x increase in engine lifespan.

Q What is the most unexpected result from treating something with Xcelplus?
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)


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?
A Yes

Q Can you treat an automatic transmission e.g. CVT (Continuously Variable Transmission) or centrifugal clutch with Xcelplus Gear Treatment?
A No. It MAY cause slippage.

Q Can you treat differentials, gear boxes, power steering 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.

Q Is there anything the Gear Treatment should not be used with?
A Yes. It should not be used with polar lubricants (alcohols) as these are incompatible. If in doubt mix the two liquids. If they fail to mix they are incompatible e.g. water is a polar liquid and will not mix


2-stroke Treatment & Upper Cylinder Lubricant (Concentrate)

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 Engine treatment?
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 and diesel engines as well where it lubricates the upper cylinder.

Q Can the Xcelplus 2-stroke Treatment be added via the carburettor?
A No. However we do have a limited amount of the carby version available on request.

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 sedimentation.

Q How do you know the Xcelplus 2-stroke Treatment is working?
Usually the RPM's increase

Q What is the most unexpected result of treating with 2-Stroke treatment?
A Pinging in single cylinder air cooled 4-stroke motorcycles decreased or disappeared.


Light Lubricant

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.


Aircraft Treatment

Q How does the Aircraft Treatment differ from the other treatments
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?
A Yes

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


Sludge Out

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 Treatment.


Ring Free

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 Engine Treatment?
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?
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 bearings.

N.B. If you have an unusual application and you're not sure please ask us.