This is the calculation for me.
It will be:
1. 1.5% westjet
2. 0.2% extra petro points
3. 2.5% (3c per liter off using $1.20 per liter)
Compared to 2% cap1 card I was using before.
2.2% extra. I use about $100 gas per month so it is about $26.40 a year. Not a whole lot but offsets a bit of the annual fee on the RBC westjet card.