I've done a fair amount of driving on two lane rural highways. There's no doubt that DRLs make oncoming vehicles much easier to see. It becomes a lot easier to judge distance, too, when the oncoming vehicle has lights on, making passing and turning left safer. I have no doubt that DRLs are a good idea. I'm also strongly in favor of the automatic headlights on many vehicles now, including my two. There are way too many people that neglect to turn the headlights on when they're needed.
Also, 55 gal over 250k miles??? Give me a break. Given that's true, though, it's nothing. It would add up to about $.20 - .30 per week at $3/gal, which would amount to less than a tenth of a gallon of gas. Small potatos. I'll gladly pay that to avoid a head-on crash.