Inclusion of fuel cost in calculating taxable service value

Gross Amount charged by Service Provider for providing Hired Vehicle is Rs. 28000/-. As per agreement, this amount is exclusive of service tax.

The fuel is provided by us (service receiver) which costs is Rs. 6000/-. The Service Provider is SSI.

What is our liability for payment of Service Tax? Should value of fuel provided by us be included while calculating our Service Tax liability?