Motor spirit classification turns on indirect fuel use, and manufacturer-only tax concession was unavailable to a dealer.

Methanol mixture was treated as "motor spirit" because the Karnataka Sales Tax Act definition covers substances used directly or indirectly to provide reasonably efficient fuel for automotive or stationery internal combustion engines. The Court noted that the mixture assisted combustion and engine performance, so it did not need to be the principal fuel. Reliance on the Central Excise tariff definition was rejected because the State Act contained its own governing explanation. The concessional 4% notification was confined to goods manufactured in Karnataka and sold to specified Government departments, so a dealer who was not the manufacturer could not claim the benefit.

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Issues: (i) Whether methanol mixture is a "motor spirit" under the Karnataka Sales Tax Act, 1957 and therefore taxable at the rate applicable to motor spirit. (ii) Whether the notification reducing tax to 4% was available to the appellant.

Issue (i): Whether methanol mixture is a "motor spirit" under the Karnataka Sales Tax Act, 1957 and therefore taxable at the rate applicable to motor spirit.

Analysis: The statutory definition treated as motor spirit any substance which, by itself or in admixture with other substances, is ordinarily used directly or indirectly to provide reasonably efficient fuel for automotive or stationery internal combustion engines. Methanol mixture was found to be injected into the combustion chamber of aircraft during take-off and at high altitude for power restoration and augmentation, and it contributed to combustion and efficient burning of the main fuel. The Court held that direct use as a principal fuel was not necessary where the substance served indirectly to provide efficient fuel function within the statutory definition. The reliance on the Central Excise tariff definition was rejected because the Karnataka Act contained its own governing explanation.

Conclusion: Methanol mixture was held to be motor spirit and taxable under the relevant motor spirit entry.

Issue (ii): Whether the notification reducing tax to 4% was available to the appellant.

Analysis: The notification applied only to goods produced by manufacturers in the State of Karnataka and sold to specified Government departments. The appellant was only a dealer and was not shown to be the manufacturer of the methanol mixture. As the appellant did not satisfy the condition of manufacture, the concession could not be claimed.

Conclusion: The notification benefit was held to be inapplicable to the appellant.

Final Conclusion: The assessment revision sustaining taxation of the methanol mixture at the motor spirit rate was upheld, and no concessional rate under the notification was available.

Ratio Decidendi: Where a taxing statute defines "motor spirit" by reference to ordinary direct or indirect use in providing reasonably efficient fuel, a substance used to assist combustion and engine performance can fall within that definition even if it is not the principal fuel, and a statutory concession restricted to manufacturers cannot be claimed by a mere dealer.

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