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MTSTrucking
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Improving fuel economy with a W900 running a 12.7 Detroit

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I would like to know what steps I could take to improve my fuel mileage. I have a W900 with a 12.7 Detroit, 13 spd, 3.55 rears on lp24.5 Accutreads. Pulling a covered wagon usually in the 75K-80K range. I'd like to make inexpensive steps first and eventually move up to a Pittsburg Power Box. I have 1.25 million miles and I've rolled mains (unnecessarily I think) and replaced the head gasket. Other than that, it's all original, even the turbo, so I've been taking good care of it. I run Amsoil and have no aftermarket products on it. Thanks.

Edited by: MTSTrucking ( ) , Kevin Rutherford ( )

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Jackie Wormley
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Like Ron said Pittsburgh power muffler and fleet air filter. I would also get rid of that turbo and put on Pittsburgh powers turbo and manifold. You need to have good air going into the motor, hence the Fleet air filter, and also you need to let the engine breathe better, hence the turbo manifold and muffler. I would also look for different tires, you can achieve lower rolling resistance by getting rid of those caps you might not need to do the full switch to 22.5 LP especially if you need the clearance. You can find some pretty good lower rolling resistance tires in 24.5 LP but the best tires are in the 22.5 LP range.

What is your opinion on the Turbo 3000D? I honestly thought that would be the first recommendation since it is probably the cheapest...not so much?

MTSTrucking,

I added one of those to my engine back in 2005 and didn't notice any change in the fuel mileage but I put it on before I had some mechanical things fixed that should have been fixed first. Pete at Pittsburgh power recommends that I take it off because he thinks it's a fuel restriction so I am going to do that when I get to my shop the next time. I will find out then if my fuel mileage goes down.

Jackie Wormley,

I've got the Turbo 3000D, I picked up about 2/10's but results are mixed. If your going to do the install yourself then ya it's probably the cheapest but the filter and the muffler have more consistent results and if your doing the work yourself the muffler may be cheaper depending on which one you need and if you need 1 or 2 but all of these are in the couple hundred dollar range. The manifold and the Turbo are a bit pricier but well worth it.

Ronald Sanford,

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Scott Warner
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What is your current MPG? I would start with tires drop down to low pro 22.5 with low rolling resistance tires and if you own the trailer i would start there. Firestone has a new trl tire out FS 455plus RR of 81 priced them the other day at 440.00 a tire out the door. i would get some flow threw mufflers on there yesterday and as for the fleet air filter it wouldn't be at the top of my list 379's and W900's get twice as much air as most do to the duel air cans. not saying fleet air filters don't work but on a the W900 you got twice the cost to switch over and i would do a few other things first. Air Tabs as Well. and SLOW DOWN...

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Ronald Sanford
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Inexpensive first I'd do a Fleet Air Filter and a Pittsburgh Power Muffler. And keep an eye out for a deal on some 22.5 rims and put low rolling resistance tires ovecorse the rims and tires will cost more but you should be able to find a good deal on the rims then at some point you'll have to buy tires anyway.

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Mel Help
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With having a W900 the fleet filters won't do you any better as far as getting more fresh air in the motor than the filters you have already.

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Paul Willis
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If you idle , it can put a stunning dent in your fuel economy.

An extra battery box (2 deep cycle batteries, or 3 if you use a laptop often)

, connected by a simple continuous duty solonoid and a switch.

Espar or Webasto bunk and engine heater, and you will see dramatic fuel economy increases.

Truck aways starts great with fresh starting batteries that way.

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Zachary Bell
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First, check your tire pressure. That is a FREE fix.

DO ANYTHING YOU CAN to cut your idle time. Shut off the engine UNLESS the outside temperature is below 15 degrees and you have no other alternative. Use Fast Idle when you do idle and the outside temp is below 15, to keep the engine warm.

Get Michelin XDA3 or X-Line Energy D drive tires (which reduce your rolling resistance from 194 to 113 or 109, respectively) or move to 22.5 rims and Michelin XDA Energy tires to reduce rolling resistance and gain fuel mileage.

Install Fleet air filters and a Pittsburgh Power muffler, those will likely give you immediate gains in fuel mileage. Have your charge air cooler tested, replace the turbo and manifold with new ones from Pittsburgh Power, and THEN consider the Power Box.

I would definitely change the tires first- AccuTreads have HORRIBLE rolling resistance.

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