Castrol has over a hundred years of experience in producing and distributing high-quality engine oils and is one of the biggest companies entrusted to provide you with the most technologically advanced engine oils available. This shows that XR77 is more economical in terms of fuel consumption and a better choice comparatively. Summary 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. We trawled a few forums to get a good idea of what smells people rate when it comes to their oil and here’s are the ones we found most commonly mentioned Nevertheless, these additives are the minority in an oil blend made from ultra-high quality base crude oils that still make up the bulk of the oil volume. One hundred per cent synthetic does not mean that the oil in this bottle is made entirely in a science lad beacon. This is explained by the fact that many manufacturers sell 2 stroke oil blends with a percentage of castor oil for additional fastening to those long straights.

It clearly shows that A747 will flow more easily than its contender and hence will consume less fuel to circulate. Castrol POWER1 Racing 4T, using ‘Race Derived Technology’ based on Castrol's long and successful racing association, flows fast and stays strong, reducing internal engine friction even under the most arduous riding conditions. If you want a clean-burning oil that’s smokeless, or at least low smoke, then try Motul 800 or Mobil 1 MX2T. 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 Castrol POWER1 Racing 4T 10W-40 is a full synthetic engine oil for modern, high performance 4-stroke sports bikes that allows for increases engine acceleration and power right up to maximum RPM.

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. Recommended oils: Silkolene Comp 2 Plus or Castrol Power 1 Racing 2T What’s the best two-stroke oil for a scooter? When comparing a two-stroke engine to a four-stroke, the most obvious difference is that in a two-stroke engine there are two complete revolutions for every combustion cycle, whereas, in a four-stroke, there are – you guessed it – four! In the last 5 years or more, the new completely synthetic 2-stroke engine oil as it is widely called has come a long way. Newly engineered polymers, biodegradable inclusions, detergents and additives that have exceeded previous lubricating standards now have other recognisable characteristics, such as octane enhancement and stabilisation, gas generating compounds to further improve combustion providing almost smoke-free emissions. Quality burning and lubrication allows some production motorcycles to run 60:1 in fuel / oil ratios, even in high revving 60cc 2-stroke racing engines with long service intervals and no undue wear of internal engine parts.

https://cdn.opieoils.co.uk/images/variants/medium/castrol/castrol-power1-a747-2t-semi-synthetic-2-stroke-racing-motorcycle-engine-oil-1-litre-5.jpg Whether you’re running a classic motorcycle or a modern chainsaw; if it has a two-stroke engine you’ll want to use the best quality 2t oil, to ensure the engine runs well and doesn’t seize. That’s my RD250 above and I run it on the best quality two-stroke oil because I don’t want to be riding around worrying whether it will seize, I just want to enjoy myself on it! Castrol POWER1 A747 is intended for racing applications only. It is not suitable for autolube systems and should not be mixed with any other oil, whether mineral, vegetable or synthetic. If your ratio is 25:1 that means 25 parts of petrol to every part of two-stroke oil. So for 1 litre of petrol you’ll add in 40ml of two-stroke oil. The pour point of XR77 is comparatively lower which shows that it will freeze later than its contender. Parameter

On the contrary, Castrol A747 has a much sweeter smell when riding. As does the Amsoil Dominator two stroke oil. These are probably my two favorite options when it comes to the best smelling oils for both motocross and enduro riding. They’re quite scarce to come by these days but keep your eyes peeled for any kind of two-stroke premix that has a castor compound in it. 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 We don’t really recommend it for use in modern machinery because there are more suitable modern oils available such as Castrol Power 1 Racing 10W-40 and Castrol Power 1 GPS 10W-40. The oil change guidelines for your machine will be calculated based on the use of a modern oil such as these and it is difficult for us to give accurate advice on what frequency of oil change would be needed if you were running on Castrol R40, but it could be as low as every 1,000 miles.