Bigger fuel tank

I replaced my OEM tank with a Titan replacement 9 years ago. My OEM tank was on 26 gallons which just wasn't enough. No regrets and I would do it again in a minute.

I've often thought about doing that myself. I hate having to stop for fuel all the time. I sometimes fill up 3 times in one day! Not often but I've had to do it quite a few times.

I would say go for it.
Drawbacks? Can't think of any. A little extra weight but that won't hurt anything. Your truck is built to carry stuff.

Absolutely! Mines a 55 gal. and I love it.

I am having a 58 gal tank installed in the bed in a couple of weeks. It will give me 89 gallons

I added an aux 63 gal tank and love it. I buy fuel where I want to not where I have to.

I love my in bed aux tank. Sure is nice to fill up when you need to instead of when you have to. The replacement tanks are VERY nice, but also very spendy. I couldn't justify that extra cost for just 20 extra gallons, but everyone has their own level of cost tolerance.

I have had the Titan 51 gallon tank on my last 2 trucks... I love the fact that I can stop for fuel when I want to , not when the trucks wants to!

Only draw back I can think of is price. Maybe ground clearance depending on the design and how you use your truck.

My truck came with 40 gallon fuel tank. I feel it's the perfect amount. I have to stop every 4 to 5 hours for fuel and a stretch. Makes for a less tiring trip.

My short bed truck also had a small fuel tank. I considered upgrading it, but really didn't have spare payload I wanted to give up to carry extra fuel. I could never pencil out the savings of buying the tank and filling with cheaper fuel rather than making more stops, but it would have been convenient. My OEM tank gave me a practical range of 250 miles between fill ups when towing which would equate to two refills a day for me on long trips.

My current chassis cab has about 500 miles of practical towing range allowing me to refill once a day on long trips. I still make stops more often, but I do see the convenience.

I feel using a phone application, like GasBuddy, is the best way to save on fuel rather carrying large quantities with you.