They also spend a lot of time going very slowly, with the engine revving quite hard, so a build-up of exhaust fumes and unburnt gunk form the engine is a topic some riders worry about. Whereas, the pour point determines the temperature at which an engine oil would freeze and will lose its flowing ability becoming frictionless. Ultimate performance in extreme riding – oil flows fast and stays strong, reducing internal engine friction The heavy use of oil will also reduce RPM, alter the octane level and burn levels of the fuel mixture due to commonly used shear volumes and with the additional benefit to increase the cost of the racers oil bill. The effects of over-oiling on engines with power valves when using this type of oil with the recommended oil / fuel ratios are not recommended. Petroleum/Mineral oils

If you’re running a modern two-stroke then look for an oil with a JASO FA, JASO FB, JASO FC or JASO FD specification. This is a Japanese oil standard benchmark, with FA being the lower spec and FD being the higher spec. The higher the spec, the most costly the oil is likely to be. The downside is that if the carbon build-up that accumulates in the engine isn’t serviced (i.e. removed) regularly, it can be responsible for fouled spark plugs, excessive smoke, and combustion deposits which can result in engine damage.It’s really good to know I’m not the only one using Castrol R! And really interesting to hear your replies, so I’ll try to answer as many (or perhaps the few) replies to this topic. A747 er egentlig ikke udviklet til 4-takt motorer - men alligevel er der vældigt gode erfaringer med olien til speedway. Den smører som den skal - men bedst af alt, holder den motoren fint ren invendigt. De nævne problemer med A747 gælder ikke 4-takt motorern - her fungerer olien optimalt under alle forhold.

Some riders believe that a specifically labelled classic motorcycle two-stroke oil is the best option but the reality is that a better quality oil is the best bet for any engine, no matter how old it is. Castrol POWER1 Racing 4T 10W-50 is a full synthetic engine oil for modern, high performance 4-stroke sports bikes that increases engine acceleration and power right up to maximum rpm. On the flip side, if you want to make as much smoke as possible (some riders of retro bikes like the RD350 like to recreate the hooligan scenes of their youth), then there isn’t a ‘high smoke’ oil but you could add in a higher concentration of oil into your tank. Castrol R 40 is a very good lubricant under certain circumstances, however it is relatively unstable and will therefore tend to promote the build up of deposits in your engine. It may not work perfectly with your wet clutch either.

What does two stroke oil do?

This shows that XR77 is more economical in terms of fuel consumption and a better choice comparatively. Summary The semi-synthetic oils are a blend of conventional synthetic developments combined with natural oils of greater consistency. In general, the balance of these oils is a bulk of mineral with a small amount of synthetic additives. The oil blender also comes with a cross section of synthetic additives. Many of these have their own specific identity and purpose enabling a more accurate blend of oil to produce the performance and emission requirements accompanied by affordability for the modern 2-stroke high-performance engine.

https://cdn.opieoils.co.uk/images/variants/medium/castrol/castrol-power1-a747-2t-semi-synthetic-2-stroke-racing-motorcycle-engine-oil-1-litre-3.jpg

Cheap two-stroke oil vs premium

However the main topic revolves around getting the mix ratio right. Too much and you’ll gum up the engine, too little and you risk engine damage. https://cdn.opieoils.co.uk/images/variants/large/castrol/castrol-power1-a747-2t-semi-synthetic-2-stroke-racing-motorcycle-engine-oil-1-litre-1.jpg https://cdn.opieoils.co.uk/images/variants/medium/castrol/castrol-power1-a747-2t-semi-synthetic-2-stroke-racing-motorcycle-engine-oil-1-litre-1.jpg It is suitable for all makes of 4-stroke bikes, both carbureted and fuel injected where API SL (and below) and JASO MA or MA-2 specifications are recommended. I have run mine on R40 for years and I’ll leave it up to everyone else to decide what they think of my decision as I start to make my replies. I do think ratio is very important and I have tried 50:1; 40:1; 33:1 and 25:1.

Its value is inversely proportional to the change in the value of kinematic viscosity which means that the greater the value of the index, the lesser the changes will occur. Parameter A747 is deliberated for racing engines only. It is not suitable for ALS (Automatic Lubrication Systems) distributes a specific amount of lubricant across the engine while it’s operating and should not be mingled with any other mineral, vegetable, or synthetic oil. Viscosity Comparison A747 kan dog have en tendens til skumdannelse i regnvej, samt at sænke kompressionsmuligheden - diise ulemper kan undgåes ved at vælge efterfølgeren: Castrol Racing XR77. Unlike a 4-stroke, there is no engine oil in the crankcases of a 2-stroke engine and therefore the piston is not being lubricated by a pool of oil held in the bottom of the engine (the sump).

The problems associated with cheap two-stroke oil

The kinematic index of XR77 is higher than its contender which means that XR77 would be less affected by temperature change (environment change). So the winner would be A747 since its environment adaptability would be relatively higher than its competitor. Endurance in Extreme Temperatures Castrol POWER1 Racing 4T 10W-40 is designed for high performance 4-stroke sports bikes to deliver optimum power and protection in all riding conditions. The Motul 800 is not a castor oil I think so it will be a Bees Knees synthetic. It will be very good stuff but it won't smell like A747. Captain Pugwash, I’ve heard about these problems quite a lot. I use Castrol R40 all the time and with regard to settling in the petrol tank I think there may be something in it. I rode my scooter (S2 TV175 engine) around this morning and there was frost on the grass and on windscreens. The old girl did seem to smoke a bit more than usual at first so perhaps the oil was starting to settle at the bottom of the tank. Time will tell on this score because I shall be riding her around whatever the weather. It has been tested and proven to deliver exceptional acceleration and power at the touch of the throttle.