Are BESTfit Fuel Tanks the Most Durable Budget Diesel Tank?

31st Mar 2026

BESTfit truck parts are crash repair replacement parts are known for their affordability and exceptional build quality. The price tag on an OEM diesel fuel tank can be a tough pill to swallow.

Thankfully, when it comes to replacing truck parts, there’s an ocean of aftermarket alternatives to choose from.

BESTfit fuel tanks stand out by gifting drivers with a budget-conscious alternative that can withstand years of use on the road.

BESTfit vs OEM

Some dealers charge you several hundred dollars for a core charge until you return the old tank or the old OEM neck back to the company.

Meaning?

Right off the bat, BESTfit gives you a $200 savings, a 2-year extended warranty, and a general 35-40% savings on a BESTfit tank versus an OEM dealership tank – no matter the tank.

We have warehouses in Denver, Atlanta, and Pennsylvania, so you can get BESTfit fuel tanks sent to you fast all across the USA.

How BESTfit Diesel Fuel Tanks Offer the Best of Both Worlds: Affordability and Craftsmanship

While a new tank can cost anywhere between $700 to $1,100, there are always other costs: new fuel tank straps, J-brackets, isolators, sending unit gaskets, or locking fuel caps, for example.

Not to mention the cost of removing an old fuel tank, transferring the residual fuel, then inputting a new diesel tank involves hours of labor.

BESTfit fuel tank keep the margins low without sacrificing quality. This way, owner-operators can reallocate some of their budget towards other related expenses, like fuel tank-related accessories and hardware.

How is it achieved? By keeping general overhead low, while not skimping on quality materials.

How BESTfit Fuel Tanks are Built and Tested for Durability

Made using sturdy aluminum, each tank is manufactured using stronger, reinforced TIG weld seams that stop leaks.

Each tank is regularly tested under FMCSA regulations to guarantee the highest quality standards.

The Drop Test

The tank is filled with water to weigh the equivalent of a standard tank full of diesel.

It gets dropped from 30 feet on top of a solid concrete surface with some cardboard on it. Dented? Sure. But no leaks whatsoever.

Submersion Test

The tank is dunked in fluid and filled with pressurized air so technicians can look for potential leak points that aren’t visible to the naked eye. If bubbles come up from a leak, the tank is rewelded and re-inspected once more for quality assurance.

Explore Every Size Option for Your Semi Truck Make/Model

Whether you need a split tank for hydraulic and fuel, or a dual tank setup, you can find BESTfit fuel tanks that are polished aluminum or painted for a custom look. You can find front-fill and rear-fill designs on driver’s side and passenger side setups. Sizes range from 28-gallon rectangular step tanks to 150-gallon aluminum tanks.

Regardless of your fill point, manifold style, or position, a BESTfit tank is designed to be very similar to the factory tank you’re used to.

You can buy a tank and install it without any modifications. There are zero core charge on the fuel tanks.

BESTfit replacement tanks fit a wide variety of factory models, classic and Next Gen truck builds alike.

Here’s an example. Peterbilt changed their manifolds to the top of the fuel tank around 2007. The old style manifold had all the fittings in line (2007 and older).

If the draw tubes are removable and the fittings are in line, you have the old style.

If the draw tubes are permanently welded to the tank, and your fittings are not in line, you have a new style manifold.

BESTfit makes both styles.

Install BESTfit Fuel Tanks from 4 State Trucks Today

Countless customers have praised these diesel tanks for how much value they bring to the table. Shop for BESTfit fuel tanks at 4 State Trucks. You can find a wide array of BESTfit fuel tank accessories like straps, brackets, mounting hardware components to outfit your new diesel tank today.

31st Mar 2026