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- ...has the same [[knock resistance]] as a mixture of 87% isooctane and 13% n-heptane. The octane rating system was developed by the chemist [[Russell Marker]].22 KB (3,330 words) - 22:38, 17 August 2009
- Gasoline/petrol is an impure mixture of linear heptane and octane and other miscellaneous light alkanes. Commercial gasolines usua27 KB (4,310 words) - 17:26, 17 May 2011