Previously you could earn 10 Petro Points per dollar spent on convenience store and car wash purchases, now with this latest change that has doubled to 20 points per dollar. Gas purchases remain at 10 points per dollar and that is where most people do earn their Petro Points, so while this change does not seem too significant, the 20 points does equate to 2 Cathay Pacific Asia Miles per dollar spent. Nowadays there are not too many retail places where you can earn 2 Major Airline miles per dollar, usually it is only .5 to 1.5.