I have a car review website how can I get car makers to let me borrow their cars for longer periods of time?

I have a car review website burnoutlane.weebly.com and I have reviewed several cars but car companies aren’t letting me borrow the cars for much longer than a normal test drive anymore is their any way I could have them lend me the car for an overnight thing because learning all about the car in 1 small test drive is hard to do? If you have any answers please tell me. My reviews are shortened by the short car rides.

Collect statistics on how many people visit your website. You might try asking your readers to mention that they are visiting the showroom as a consequence of your review. Have your readers send in testimonials about how valuable they find your reviews. Test drives cost the manufacturers money. Show them the money is being wisely spent. Get enough traffic and besides giving you a longer test period they’ll be inviting you to their special preview events at their proving grounds or a test track, expenses paid.