heffergm Posted June 24, 2017 Report Share Posted June 24, 2017 The guy at the 'bike shop' not knowing is not indicative of truth. At its most obvious, Motul wouldn't produce two different oils if they were the 'same'. Empirically, any idiot can open a bottle of 800 and see: it's dyed red, and it's very thick. Open a bottle of 710 and it's dyed green, and it's a lot less viscous. Conveniently, Motul provide data on each oil: 710: https://s3-eu-west-1.amazonaws.com/motul-production2/images/product_descriptions/technical_data_sheets/78423/710_2T_TDS__28GB_29.pdf?1492017625 800: http://motul.speclube.com/wp-content/uploads/products/specifications/800_2TFactoryLine_OffRoad_8371_(GB).pdf Basically: 800: PROPERTIES Red coloured. Density at 20°C (68°F) ASTM D1298 0.911 Viscosity at 40°C (104°F) ASTM D445 120.2 mm²/s Viscosity at 100°C (212°F) ASTM D445 15.5 mm²/s Viscosity index ASTM D2270 135 Flash point ASTM D92 252°C / 485°F 710: PROPERTIES Color Visual Green Density at 20°C (68°F) ASTM D1298 0.862 Viscosity at 40°C (104°F) ASTM D445 46.4 mm²/s Viscosity at 100°C (212°F) ASTM D445 8.9 mm²/s Viscosity index ASTM D2270 175 Flash point ASTM D92 88°C / 190.4°F TBN ASTM D2896 2.15 mg KOH/g Which is to say, they aren't the same. 1 Quote Link to comment Share on other sites More sharing options...
mazda13bbpt Posted June 25, 2017 Author Report Share Posted June 25, 2017 16 hours ago, heffergm said: The guy at the 'bike shop' not knowing is not indicative of truth. At its most obvious, Motul wouldn't produce two different oils if they were the 'same'. Empirically, any idiot can open a bottle of 800 and see: it's dyed red, and it's very thick. Open a bottle of 710 and it's dyed green, and it's a lot less viscous. Conveniently, Motul provide data on each oil: 710: https://s3-eu-west-1.amazonaws.com/motul-production2/images/product_descriptions/technical_data_sheets/78423/710_2T_TDS__28GB_29.pdf?1492017625 800: http://motul.speclube.com/wp-content/uploads/products/specifications/800_2TFactoryLine_OffRoad_8371_(GB).pdf Basically: 800: PROPERTIES Red coloured. Density at 20°C (68°F) ASTM D1298 0.911 Viscosity at 40°C (104°F) ASTM D445 120.2 mm²/s Viscosity at 100°C (212°F) ASTM D445 15.5 mm²/s Viscosity index ASTM D2270 135 Flash point ASTM D92 252°C / 485°F 710: PROPERTIES Color Visual Green Density at 20°C (68°F) ASTM D1298 0.862 Viscosity at 40°C (104°F) ASTM D445 46.4 mm²/s Viscosity at 100°C (212°F) ASTM D445 8.9 mm²/s Viscosity index ASTM D2270 175 Flash point ASTM D92 88°C / 190.4°F TBN ASTM D2896 2.15 mg KOH/g Which is to say, they aren't the same. Haha you've really gone to some effort here but great info that is very useful! The bikes ran ok today but still not getting ridden hard enough! I will be using the 710 from next weekend as it makes total sense about the flash point and all the advice and help is pointing to wrong oil choice for these bikes. thanks for the help. rich Quote Link to comment Share on other sites More sharing options...
dadof2 Posted June 25, 2017 Report Share Posted June 25, 2017 (edited) Those oils are as different a chalk and cheese. 800 is for an engine that is run hard and will probably be expected to be rebuilt fairly frequently. 710 is definitely the one for trials use especially if fuel with ethanol is being used. From the data it looks as if 800 is not TBN rated to combat acidity in fuels which comes from sulphur or ethanol. Edited June 25, 2017 by dadof2 misleading wording corrected Quote Link to comment Share on other sites More sharing options...
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