Several great tips rolled in as responses to recent posts on car rentals. Some were posted to comments, but in case you missed them, I’m upgrading them to a post of their own:

Max out your dropoff time
Reader Jason, a former employee of one of the major rental car chains, responding to a post about disappearing grace periods for late returns, offered this advice:

Make sure the rental agent updates your pickup time if you arrive after your scheduled pick up time (i.e. scheduled to pick up at 2pm and you don’t arrive until 3pm). If you arrive early, the computers will likely set your pickup time to the actual time you pickup the car, but if you arrive late it’s up to you and/or the agent to update your pickup time. This little trick has caught a lot of renters who return at the same time they picked up the car, but still get the late fees.

International rentals: Test-drive local booking sites
Reader NPM, author of the Porto City Guide (or Oporto, if you prefer) offers this tip:

Internationally, renting online through local branches can be cheaper than using US major car rental companies’ websites — even for the same company. For instance, in Portugal www.budgetportugal.com tends to be much cheaper than budget.com.

Warehouse discounts for underage renters
Reader Brent offered this tip on saving money if you’re under the age of 25:

Get an Executive membership at Costco. The cost is 100$ but you get the membership right away and it’s worth it. Then rent a car from Budget Car Rentals. The executive Costco membership waives the 21-24 underage driver fee (savings of 25$/day), allows you a free upgrade in car category, so basically if you’re going to get a full size vehicle, you only pay for what a mid-size would cost - and finally they also waive 10% for being a Costco executive member.

After four days, you’ve broken even! And the Costco executive membership is yours to keep…

Know the upsell speech
Finally, over at the Consumerist, they got their hands on Enterprise Rent-a-Car’s script which their associates use to try to convince you to buy their loss/collision coverage. Read it and ignore the temptation to spend your money unnecessarily.

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A reminder: Reader tips are always welcome! Just use the “contact” link at the top right of every page, or leave a comment.

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Related:
- Reader mail: If you’re under 25, how do you rent a car without huge surcharges?
- Reader mail: What happened to car rental late-return grace periods?
- Rental car agent blows smoke up my backside, redux
- Loss of use? Get lost.