A memorandum of understanding (MoU) was signed in this regard recently, an official release said here today.
The MoU has been signed for three years and PRTC would save Rs 2.10 crore during the period, it said.
"The PRTC will be able to save Rs 19,000 per day, Rs six lakh per month and Rs 70 lakh annually," it said.
PRTC is purchasing diesel from IOC. PRTC buses are covering 2.5 lakh km area with the consumption of 75,000 litre diesel daily, the release added.