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| Effect of cetane improver on fuel mileage http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=65744 |
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| Author: | sca2 [ Sun Mar 11, 2012 11:20 pm ] |
| Post subject: | Effect of cetane improver on fuel mileage |
Has anyone done any checking to see if a cetane improver helps or hurts fuel mileage? I have been putting the AMS/oil cetane improver in my CRD and it seems that the fuel mileage has gone down a bit. Is the engine not working hard enough to utilize the better fuel or is it just that the weather has been cooler and the CRD seems to be very sensitive to outside temperature ? |
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| Author: | warp2diesel [ Mon Mar 12, 2012 9:36 am ] |
| Post subject: | Re: Effect of cetane improver on fuel mileage |
The higher the cetaine the faster the burning starts with out a lag. To compensate for lousy 40-45 cetaine fuel, the timing can be advanced a little to compensate for an engine that was designed to run on 55 cetaine. All non OEM tunes advance the timing to compensate (GDE more than Inmotion or Rocketchip) for the crappy US/Canadian cetaine. You tune most likely has the timing advanced to the point where boosting the cetaine of the fuel you use has a neglable effect on fuel economy. If you had a tank of crappy 40 cetaine fuel, the Amzoil cetaine boster may increase your mileage a little. I use Amsoil oil in my engine and I carry a bottle of Amsoil cetaine booster for when I have to use lousy fuel when no better fuel is available. For general use with a fuel that I know the quality is OK and to better lubricate my CP3 pump and provide a mild cetaine boost, I use Walmart outboard 2cycle oil. Keep in mind a fuel that produces the best fuel economy with an Inmotion Stage II tune or Rocketchip tune may not produce the best fuel economy with a GDE Eco Tune. When driving habits/conditions and local environment are the same, it all boils down to timing advance and cetaine. |
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| Author: | maxwellp [ Mon Mar 12, 2012 10:12 am ] |
| Post subject: | Re: Effect of cetane improver on fuel mileage |
I think it is Snake Oil, It may work but with extra cost you will gain nothing. I use Power Service in the winter if I have to use unknown fuel, this is to keep it from gelling. I true higher cetane number should give you better mpg. It must not be a requirement to post that number I have never seen it here in WI. |
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| Author: | fastRob [ Mon Mar 12, 2012 2:03 pm ] |
| Post subject: | Re: Effect of cetane improver on fuel mileage |
Mine starts better and in the winter here that means a lot. I splash Powerserve grey in with 1 oz/gal 2 stroke from Walmart $12.15/gal Every once in a while crappy diesel shows up, towing, hot, cold weather, why not? |
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| Author: | ATXKJ [ Mon Mar 12, 2012 7:43 pm ] |
| Post subject: | Re: Effect of cetane improver on fuel mileage |
PowerService grey gives me 1-2 mpg better - however whether that's cost effective - is a solid maybe.... |
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| Author: | lurch519 [ Tue Mar 13, 2012 8:12 am ] |
| Post subject: | Re: Effect of cetane improver on fuel mileage |
So.... if you consistantly fill up at one particular station, you can fiddle with the quantity and brand of fuel additive to optimize your results. The higher quality the fuel you start with, the less effective your fuel additive will be? With the warmer weather coming here in Arizona, will the need for cetane improver increase or decrease ? If one were to add more airflow ( ie GDE turbo kit ) would the increased "boost" require better fuel or allow higher cetane rated fuel for potentially better fuel economy ? |
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| Author: | LMWatBullRun [ Tue Mar 13, 2012 12:31 pm ] |
| Post subject: | Re: Effect of cetane improver on fuel mileage |
fastRob wrote: Mine starts better and in the winter here that means a lot. I splash Powerserve grey in with 1 oz/gal 2 stroke from Walmart $12.15/gal Every once in a while crappy diesel shows up, towing, hot, cold weather, why not? For every 10 gallons of petrodiesel I add 4 ounces of 2 cycle oil, 3 ounces of PS gray or white depending on the season, and 1 ounce of Diesel Stabil. Don't know if it helps, but it eases my mind when I think about rebuilding a $10,000 motor. Like most lubrication issues, you only see the difference at the END of the service life. I expect my pump and injectors will be working longer than most. |
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| Author: | lurch519 [ Sun Mar 18, 2012 1:56 am ] |
| Post subject: | Re: Effect of cetane improver on fuel mileage |
Well, cutting back on the cetane improver in my Dodge has netted me a measureable improvement in mpg. So tommorrow the CRD gets a fillup with a little bit of biodiesel ( 1/2 gal )and some Power Service instead of a big slug of AMS/oil cetane improver and a big slurp of Power Service and we'll see what happens. Whoooooo ya ! This is FUN ! |
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