I think the quality of fuel can vary enormously in India. What might be a better solution is to bring a bottle of "octane booster" and use it as you need it.
I think it's probably more important to use a fuel filter, as a lot of the fuel you'll buy will be contaminated with specks of dirt, rust, etc.
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Bruce Clarke
brclarke@islandnet.com
www.islandnet.com/~brclarke