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01-04-2025, 11:56 AM
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#1
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Junior Member
Join Date: May 2024
Posts: 18
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Diesel fuel additive test results 100% enlightening
I am very new to the RV and Diesel Engine Motorhome ownership. Caring for the Diesel Engine is/can be very complex. I researched Diesel Fuel Additives till my eyes bled and with all the opinions on who's additive is BEST, I think I have discovered a little more concrete test information on actual results.
The Repair Geek and the Motor Oil Geek (Lake Speed) teamed up and conducted some very detailed and interesting Diesel Fuel Additive testing. They tested most of the top recommended Diesel Fuel Additives and the NUMBER ONE PRODUCT WAS:
Opti-Lube XPD All Seasons Diesel Fuel Additive.
I've added the link to the You Tube video. I was using Hotshots Secret Everyday but will switch to the Opti Lube XPD.
What are your thoughts on this topic or recommended Diesel Fuel Additives? Will you be switching diesel fuel additives?
Thank You.
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01-04-2025, 12:20 PM
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#2
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Senior Member
Join Date: Apr 2024
Location: WI Driftlesser
Posts: 2,583
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I'm not watching the video as I've exceeded my tolerance for the motor oil guy for this year. Any additive is only as good as the reason you're using it, most don't need any additive. The most common additive needed is a biocide, because RVs have large tanks, and if you don't use enough the fuel ages and builds up water. Flat bottomed tanks, poorly installed dip tubes, and topping up tanks instead of running near empty all contribute to worse contamination and fuel aging.
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01-05-2025, 09:57 PM
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#3
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Junior Member
Join Date: May 2024
Posts: 18
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Quote:
Originally Posted by SafariBen
I'm not watching the video as I've exceeded my tolerance for the motor oil guy for this year. Any additive is only as good as the reason you're using it, most don't need any additive. The most common additive needed is a biocide, because RVs have large tanks, and if you don't use enough the fuel ages and builds up water. Flat bottomed tanks, poorly installed dip tubes, and topping up tanks instead of running near empty all contribute to worse contamination and fuel aging.
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What are your thoughts on WINTER TREATMENTS?
Here is an interesting test on anti gel and moisture treatments:
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01-05-2025, 10:32 PM
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#4
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Senior Member
Join Date: Mar 2024
Location: Bohemia NY
Posts: 2,020
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Most fuel and oil treatments or additives get most of their performance improvements from the lightening of your wallet.
__________________
Dennis
Bohemia NY
2008 Nimbus 342 SE Carlyle
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01-06-2025, 04:43 AM
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#5
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Junior Member
Join Date: May 2024
Posts: 18
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Quote:
Originally Posted by d23haynes57
Most fuel and oil treatments or additives get most of their performance improvements from the lightening of your wallet.
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I believe that with regards to OIL TREATMENTS but, I believe that the fuel treatments do work. If your high pressure fuel pump is happy with Low Sulphur Fuel, more power to you.
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01-06-2025, 06:29 AM
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#6
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Member
Join Date: May 2022
Posts: 91
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Have Used Diesel Power Service for nearly three decades without issue. PS911 came out as a alternative to the white jug for those that refuse to treat before gels over. Sat in a shop with a broom handle and PS sitting ON Gelled fuel stirring until the gel broke down MANY, MANY times. Not impressed with anything else.
Detroit Diesel had in their earlier repair manuals a Temperature Formula for adding REGULAR UNLEADED Gasoline(Pre 1940s Unleaded) to tanks to combat Gelling, had to be EXTREMELY Cautious of that in the older engines, would NOT do that on the tight tolerance newer electronic injection engines.
90% of the Fuel treatments out there are Kerosene based, nothing intrinsically new.
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01-06-2025, 09:52 AM
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#7
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Senior Member
Join Date: Apr 2024
Location: WI Driftlesser
Posts: 2,583
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I'll disagree with that a bit. They may be all kerosene based, but they contain ingredients more effective than kerosene for preventing wax crystal formation. And it's wax that we're talking about overwhelmingly when we say a diesel "gelled" up at 0F. 911 is an emergency, stuck on the side of the road in a blizzard freezing to death product. Or, don't want to spend thousands on a tow, start you *&%$# product.
As far as I've been told, #2 fuel and premium winterized fuel both come from the same nozzle at the rack/refinery/tank farm, the difference is the additive dumped in the semi tanker by the driver. So they'll charge a few cents more per gallon for the additive, or you'll add it yourself. At some point, temps will get cold enough that blended fuel with #1 will be required, not exactly clear when that occurs.
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01-07-2025, 05:05 AM
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#8
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Member
Join Date: May 2022
Posts: 91
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Hauled and delivered fuels, still in contact with fuels delivery personnel I worked with or around as to information.
#1 Diesel is nothing more than straight fuel oil from the refinery, once purified and all the potential contaminants removed including paraffins, Is a Blending agent in this respect as lubricant mechanisms are all removed and cannot be used in pure form. #2 Diesel has allowed levels of said materials, paraffins particularly, sulphur in the old days and now ULSD has new versions of lubricity additives to compensate for that lack or removed component.
Contrary to popular commentaries Red AG Fuels are nothing more than Road Fuels with a Red Dye added at delivery point, there are minimally few Specific Red Fuel delivery vehicles as the Dye collects on all surfaces where would contaminate Clear Fuels to be delivered for Road Use. One Cap Full of Dye at delivered Tank will render all the fuel in that tank for several refills to a Red Hue. Adding ATF as some proclaim can net a large ticket for Red OFF Road Fuel as the Red hue will set those wheels in motion.
As picked up Winter Blended fuel in Hartford IL in the 1980s the fuels delivery supplier blended percentages of #1 and #2 fuels where particular companies could have additional materials added, all of which were pumped until delivery lines vacated and/or were flushed with just fuel. They do not have much similarity to Single Line Gas station Pumps where some residuals always remain. We hauled JP Fuels as well as Diesel Fuel, Same trucks, so had to have ALL the residual materials removed or emptied prior to refills. Gasoline was also hauled yet used a Flush material at the supply site of what was considered Waste Fuel that was not discarded but blended into a separate tank either going to or from diesel to or from gasoline. Really do not want to know where that went.
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01-16-2025, 01:13 AM
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#9
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Senior Member
Winnebago Owners Club
Join Date: Nov 2014
Location: Dayton, OH
Posts: 1,149
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Good information Dave,
When does this mixing of the two fuels start, and is it based on the calendar or the temperature?
__________________
2007 Winnebago Journey 36SG and 13 Honda CRV Toad,
e-Trailer XHD Towbar (Demco), Blue Ox baseplate, SMI Stay N Play brakes
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