Quick Answer

You Asked How many MPG does a 12-valve Cummins get?

a buddy of mine has a 96 2500 std cab long box 4wd, a few mods and is getting between 18-22 mpg depending on the right foot and where you are driving, the best 12v is 96-98.

How many miles can a 12v Cummins go?

Cummins diesel engines typically have a range of 350,000 to 500,000 miles.

What is the fuel mileage for a 5.9 Cummins?

We own five Dodge 4×4 pickups with the 5.9L Cummins, and we are thrilled with all the trucks. All five trucks we own average 29 MPG highway, and 24 MPG in town. Cummins 5.9L has the fuel economy, speed, and the power to pull.

Is a 12-valve Cummins better than a 24 valve?

12v vs 24v Tuning &amp
Aftermarket Potential

When it comes to serious power and performance the 12v 5.9 Cummins takes the win. These engines are known to hold up better at extreme power levels when compared to the 24v engines. P7100 injection pumps on the 6BT are easier to mod and support the extra power.

How reliable is a 12v Cummins?

The Cummins 12v/6BT is widely regarded as the best and most reliable diesel engine ever produced. These engines are extremely simplistic, operating with mostly mechanical components rather than complicated electronic ones. The simplicity allows for massive power potential in conjunction with ultimate reliability.

How much is a 12-valve Cummins Engine worth?

A shop skilled in Cummins swaps will charge around $12,000 to $15,000 to take a 12-valve version with the 5R110.

How long will a 5.9 12v Cummins last?

The Cummins brand is extremely reliable and prides itself on long-lasting engines. The 5.9-liter engine can expect to churn out 300,000 to 400,000 miles.

How many miles will a Ram Cummins diesel last?

But most diesel truck engines do not last that long, not without major work. To be more precise, Ram claims its 6.7L Cummins engine will last for 350,000 miles. For this reason, a Cummins-powered Ram 2500 with good service records is considered high mileage between 350,000 and 500,000 miles.

How many times can you rebuild a Cummins?

It is theoretically possible to overhaul engines indefinitely. It is only a recommendation for operations that are not commercial. In real life, after a couple of overhauls, a new engine may be as good as a rebuilt one.

What is a 12v Cummins?

The 12-valve Cummins, officially the Cummins 6BT, is the engine at the bottom of the family tree of diesel engines (at least in pickup trucks). Its simple, straightforward design is a symbol of reliability, solid engineering and tractor-style torque.

How can I make my 5.9 Cummins more fuel efficient?

How to Improve Fuel Mileage With Cummins Diesel

  1. Drive your Cummins-powered truck with optimum fuel mileage in mind.
  2. Shift early if your truck has a manual transmission.
  3. Buy quality fuel for your Cummins.
  4. Replace your standard engine oil with a good synthetic.
  5. Purchase a power module designed for your Cummins diesel.

What year 5.9 Cummins is best?

1994-1998 2500 &amp
3500

As far as performance potential goes, it doesn’t get any better than the mechanical P7100 equipped versions of the 12-valve 5.9L Cummins. They’re simple, rock-solid reliable, and can easily tick off a half a million miles if properly maintained.

Why are 12v Cummins so good?

What made the Cummins so popular was the fact that its peak power and torque was insanely usable—in fact, the redline is only at 3,000 RPM! The 12-valve was able to get respectable fuel economy while producing torque figures never-before seen in an ordinary pickup truck.

Why is the 5.9 Cummins reliable?

Outside of the fuel system, the 5.9 24v is a very reliable engine. The engine internals such as the pistons, rod, and crankshaft will last a lifetime and can hold up beyond 500,000 miles. Outside of the fuel system components, you should expect to replace common items like water pumps, hoses, belts, etc.

What is the best year for 12 valve Cummins?

1996-1998 has the best injection pumps (perhaps ignoring the 1989-1993 VE) and stronger automatics compared to earlier years. Look at the buyers guide section in the thread below. The 1998 12 valve trucks were only built in 1997.

How much HP can a stock 12v Cummins handle?

The forged-steel connecting rods found in the 12-valve 5.9L (and ‘98.5-’02 24-valve engines) are of an I-beam design and capable of easily handling 800 rwhp in stock form.

How do you get the power out of a 12v Cummins?

Double The Horsepower of Your 12 Valve Cummins | Power Driven Diesel

How much does it cost to 12 valve swap?

Going the 12-valve, 5R110 route can be pulled off for $12,000 to $15,000 at a shop that’s seasoned in Cummins swaps. Sprinkle in a little more power and the cost obviously goes up, but for a basic, 350hp (ish) 5.9L-powered ’03-’10 Super Duty you’ll get a Cummins repower that’s cleanly done and rock-solid reliable.

How many cylinders does a 12V Cummins have?

The 12 valve was manufactured between 1989 and 1993, and its common names include 6BT Cummins 12V, 12 Valve Cummins, and 1st Generation Cummins. The engine is an inline-6 cylinder with a cast-iron block and a cast-iron cylinder head with six head bolts per cylinder.

What Cummins Engine is best for swap?

Those looking to perform a Cummins diesel conversion often stick with the 5.9 L Cummins motor found in trucks from 1989-2007 as they feature reliability, power, fuel economy, and simplicity. Arguably, they have been proven to be the best diesel motor to swap into most any application.

What is high mileage for a Cummins diesel?

According to Consumer Reports, a properly maintained Cummins engine can last 300,000-350,000 miles. But a poorly-treated truck can wear out much sooner. Therefore, a diesel truck with proper service records or even one that received precise “fleet” maintenance commands a premium.

What is considered high mileage for a diesel?

If used, any pickup truck equipped with a Cummins or Duramax engine that reaches 350 thousand miles is considered high mileage according to Prosource Diesel. For a Powerstroke diesel engine, 350,000 miles or more is regarded as well as high mileage.

What year did the 12v Cummins come out?

1st Gen 12 Valve 5.9L Cummins Specs

1st Gen 5.9L Cummins Years: 1989-1993
Firing Order: 1-5-3-6-2-4
Fuel Injection: Bosch VE44 Mechanical injection pump, mechanical injectors, direct-chamber fuel injection
Turbocharger: Holset Fixed Geometry Turbocharger (VGT)
Valvetrain: Overhead Valve Engine (OHV) 2 Valves Per Cylinder

Is 200 000 miles alot for a Cummins?

Even when used extensively for towing and hauling, Powerstroke, Cummins and Duramax diesel trucks typically last well beyond 100,000 miles. Because of that, it’s not uncommon to see diesel pickups with 200,000 and even 300,000 miles commanding good resale values on the used truck market.

What is considered low mileage for a diesel truck?

Diesel trucks in general are sold with higher mileage than your average used car. Generally, it’s best to consider trucks that have under 250,000 miles on the engine.

How much does it cost to rebuild a Cummins engine?

It would cost between $2,500 and $4,000 for an engine rebuild. Usually the engine gets this type of repair when the bearings and seals need to be replaced, obviously removed and reinstalled.

What is a lot of hours on a diesel engine?

How Many Engine Hours Is Alot For A Diesel? The average diesel engine lasts between 6,000 and 8,000 hours while properly maintained, and requires much less work and money than gas engine replacements.

What is a lot of hours for a diesel truck?

According to a general rule, up to 2,500 hours is a well-broken-in number, whereas 35,000-5000 hours are considered high.

How many hours is a 5.9 cummins good for?

It is common for engines to last 20,000 hours or more with good maintenance. The average cummins lasts 5000 hours, and in equipment they can idle for a long time.