Just received by email - good for those who got in for the 20,000 Qantas Points for signing up for StarCard back in December.
Add tolls to your StarCard, Caltex sends you a new eTag for your car, and tolls get added to your monthly invoice. Costs 50c per month per car, but you don't have to pre-pay your tolls any more. Great for Uber drivers!
You'll need to use a toll road with the new tag by 31st May, and they'll give you 5,000 points. I couldn't find how to add tolls to my account in My Star Cards, you might have better luck.
Caltex web page talking about the new tolls feature is here but link is to screenshot of email as website doesn't mention the Qantas offer.
You must ring them up