The above link prepared by prateek will give answers to most of your questions.
So please bookmark the same.
Until you cross the warranty period stick with TVS oil.
First ask them in detail what you provide in extended warranty. Dont go for oral descriptions given by them.
Ask for templates or pamphlets describing what and all is covered. After that only you can consider whether its worth or not.
Nowadays most of the dealers provide the same. The agreement is with the dealer and not with the company. So you cant get the warranty from other dealers.
So if dealer says so & so stuffs are not covered you cant fight with them nor complain to the TVS company.
I hope you got my point. So decide wisely.



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