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Old 04-10-2015, 10:55 PM   #15
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If I am in a farming community, I have no problem stopping at any station large enough to get in. Grain is hauled by 18 wheelers all over the rural areas and much diesel fuel is used. As a stockholder in a fair size Exxon station and bulk distributor, fuel usually comes from the cheapest source to stay in the market. It does however have to meet standards.


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Old 04-10-2015, 11:16 PM   #16
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I go to the places where I see semi's fueling up as much as possible
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Old 04-10-2015, 11:29 PM   #17
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Best fuel filter I can get for the standard OEM filter housing, a Glacier Diesel Products 5 micron or better secondary filter before it hits the injector pump. Change on schedule, add a cetane booster/lube addative and my Cummings 5.9 run all day. I do try and buy where there high turnover.
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Old 04-11-2015, 06:40 AM   #18
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Best fuel filter I can get for the standard OEM filter housing, a Glacier Diesel Products 5 micron or better secondary filter before it hits the injector pump. Change on schedule, add a cetane booster/lube addative and my Cummings 5.9 run all day. I do try and buy where there high turnover.
oh yeah
i run 2 filters as well
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Old 04-11-2015, 08:18 AM   #19
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Diesels are fairly tolerant of density and cetane, as long as it is clean. As long as you buy from stations with good turn over, you are way better off spending your time and money on quality filtration.
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Old 04-11-2015, 01:02 PM   #20
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I find measuring MPG per tank to be almost useless. Wind speeds, road grades, and my foot are known indicators of variation. My biggest variable though seems to be how level the fueling station is. I know that even filling my tank to overflowing out the fill spout the amount I put in can vary by as much as 10 gallons if the parking pad tips toward the fill spout. That could cause a variation in mileage by as much as 10%, probably a lot more than any additives would cause.
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Old 04-11-2015, 03:05 PM   #21
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I find measuring MPG per tank to be almost useless. Wind speeds, road grades, and my foot are known indicators of variation. My biggest variable though seems to be how level the fueling station is. I know that even filling my tank to overflowing out the fill spout the amount I put in can vary by as much as 10 gallons if the parking pad tips toward the fill spout. That could cause a variation in mileage by as much as 10%, probably a lot more than any additives would cause.
Moreover, BTU's per gallon vary according to temperature and density. JetA can, for instance, vary from 6.5 to 6.9 lbs per gallon. Additionally, even within constant density a warm gallon has few BTU than a cold gallon. Fuel dispensing pumps are usually calibrated to dispense a gallon at 60F, or thereabouts.
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Old 04-12-2015, 07:26 PM   #22
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ASTM D975 sets the minimum Cetane rating for #2 diesel fuel at 40 and all US highway use engines are designed for that. Typical values at the pump are in the 40-43 range, from what I understand, except that California apparently requires a minimum of 53. A higher cetane rating gives a tiny bit more time for combustion to occur in the cylinder and presumable makes a cleaner burn. According to what I see in the tech papers, using a fuel with a higher cetane rating than the engine design requires doesn't improve power, but it might run a bit smoother and cleaner.
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Old 04-12-2015, 08:41 PM   #23
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I would like to thank everyone on the forum who has provided me with some insight, information, etc. on the subject of diesel fuel. The bottom line seems to be: 1) buy from a reputable station with good turnover 2) change your filters often 3) put in some additives to handle moisture and other issues if the coach will be parked for any length of time. Thanks again.
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Old 04-12-2015, 09:02 PM   #24
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This short tutorial may help. Cetane in diesel fuel
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Old 04-13-2015, 07:03 PM   #25
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You don't find Pilot an Flying Js on the old US highways which are what we like to travel. But you find big trucks everywhere so I look for any stations that have a truck island. I've had no fuel related problems yet.
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Old 04-17-2015, 01:13 PM   #26
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Why is it so hard to find quality diesel fuel?

Around here, the Petro and Loves both buy their diesel at the cheapest fuel terminal. Different sources all the time. All the wholesalers fuel is good from what I've seen. Bad or contaminated fuel means they will lose customers. Trust my, they don't want that to happen.
BTW, I deliver fuel.
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