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Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallIowa farmers were offered a biodiesel credit of 25 cents per gallon for B11 and 50 cents per gallon for B20, up to $500. But this was a limited program credit—not a discount available at every diesel pump—and a 2026 application cycle has not been verified. As of October 8, 2026, the Iowa Renewable Fuels Association’s program page still specifies 2025 purchases, so confirm with IRFA that a new cycle is open before buying fuel expecting reimbursement.
What the Iowa biodiesel credit offered
The Iowa Renewable Fuels Association (IRFA) launched its On-Farm Biodiesel Credit Program in 2022 for Iowa farmers using biodiesel in an on-farm tank connected to an agricultural operation. Its historical advertised credit was 25 cents per gallon for B11 and 50 cents per gallon for B20, capped at $500 per diesel end user. The program required an application and qualifying proof of purchase; it was not an automatic reduction at the pump. IRFA’s program page lists the rates and receipt requirements.
B11 contains 11% biodiesel. B20 contains 20% biodiesel blended with 80% petroleum diesel, according to Successful Farming’s 2022 report. “B20 and above” appears in IRFA’s current page rate description, but that wording does not establish that every higher blend is suitable for every machine.
How the historical B11 and B20 credits compared
| Blend | Biodiesel share | Historical credit | Maximum | Equipment approval |
|---|---|---|---|---|
| B11 | 11% | 25 cents per gallon | $500 per diesel end user across the program | Check the equipment maker’s guidance; universal approval is not established. |
| B20 | 20% | 50 cents per gallon | $500 per diesel end user across the program | Check the equipment maker’s guidance; universal approval is not established. |
These rates and cap are historical program terms, not confirmation that an application can be submitted in 2026. A higher credit for B20 does not make it the right choice if the engine or fuel system is not approved for that blend.
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- Dual-phase effective in both diesel fuel and water as recommended by major diesel engine manufacturers
Is the program open in 2026?
A 2026 round is unverified. IRFA’s program page, checked October 8, 2026, still says purchases must be made in 2025. The same page invites applications but contains inconsistent date references in its receipt instructions. Separately, an IRFA board document from 2025 records support for continuing the program through the end of 2025. Neither the page’s continued availability nor its application prompt establishes a 2026 funding round or eligibility period.
Before purchasing fuel in expectation of a credit, contact IRFA and confirm whether a new cycle exists, its eligible purchase dates, remaining funding, receipt rules, and application process. The historical terms below should not be treated as current until IRFA confirms them.
Rank #2
- Dual-Phase, effective in both diesel fuel and water, and does not contain alcohol of any kind
- Effective as a “quick-kill” biocide and for long-term diesel fuel maintenance, effective in all diesel fuels, including Ultra Low Sulfur Diesel (ULSD), biodiesel and biodiesel blends
- Kills microbes (bacteria and fungus) that grow in dispersed and free water associated with diesel fuels, safe for use in all diesel engines
- Prevents fuel-filter plugging – helps prevent fuel system failures; Protects fuel system components against organic acids created by microbial growth – prevents fuel tank corrosion
- Improves fuel performance and reduces engine maintenance costs and will not void engine manufacturer's when used as directed
Who qualified under the published program terms?
IRFA’s published terms describe a statewide Iowa program for agricultural operations using biodiesel delivered to an on-farm tank. The program page lists Iowa farm delivery, agricultural use, applicants age 18 or older, an itemized receipt showing fuel type and gallons, and limited first-come funding. It also specifies a 2025 purchase date, which is why those criteria do not by themselves prove eligibility for any future cycle.
The 2022 program announcement described an online application and proof of purchase. For the current page’s stated receipt requirements, the receipt should document the fuel type and gallon count; the page also asks for delivery-address details. Confirm all required documents and dates directly with IRFA before relying on these instructions for a later cycle.
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- One 16 oz bottle of Killem
- Treats 1280 Gallons
- Controls Bacteria and Fungi Growth
- Reduces Corrosion
- Reduces Slime
What funding history says—and does not say
When IRFA relaunched the program in March 2023, it announced $45,000 in available funding. The association said the 2022 round had exhausted $35,000 in credits and reached almost 100 farmers. Those figures describe earlier rounds only; they do not establish present funding, current participation, or a 2026 deadline. IRFA also described awards as limited and first come, first served.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Check equipment compatibility before choosing a blend
Biodiesel compatibility depends on the specific engine, fuel system, and model year. The historical campaign reported manufacturer approvals for some equipment, but it does not establish blanket approval across John Deere, Case IH, or other brands. Check the operator’s manual or ask the equipment manufacturer for guidance on the exact model and blend. Do not choose B20—or any higher blend—solely because its historical credit was larger.
Quick Recap
Best Value
- KILLS & PREVENTS BACTERIA. Highly effective biocide to kill and prevent microbial growth in fuels and tanks (bacteria & fungi). Lubricates injectors and fuel pumps.
- DUAL PHASE CHEMISTRY. Partitions both water and fuel phases for more effective and complete protection against microbes that cause contamination and corrosion. Prevents corrosion of fuel tanks and metal components caused by the acidic by-products of microbial growth.
- EXTENDS FUEL FILTER LIFE. Excessive sludge accumulation, clogged fuel filters and expensive fuel polishing can shut down engines. Proactive use of a biocide prevents biomass accumulation in fuel tanks, extends fuel filter life and inhibits microbial influenced corrosion.
- INCREASES LUBRICITY. As an added benefit, BioborJF has been proven to increase the lubricity properties of jet fuel, providing additional protection and reduced wear to fuel delivery components.
- OEM APPROVED. Proven to restore lubricity levels, exceeding ASTM standards and protecting injectors and pumps from premature wear. (ASTM-D6079 HFRR- engine manufacturer and industry standard testing).
Rank #4
- KILLS & PREVENTS BACTERIA. Highly effective biocide to kill and prevent microbial growth in aviation fuels and aircraft (bacteria & fungi). Lubricates injectors and fuel pumps.
- DUAL PHASE CHEMISTRY. Partitions both water and fuel phases for more effective and complete protection against microbes that cause contamination and corrosion. Prevents corrosion of fuel tanks and metal components caused by the acidic by-products of microbial growth.
- EXTENDS FUEL FILTER LIFE. Excessive sludge accumulation, clogged fuel filters and expensive fuel polishing can shut down engines. Proactive use of a biocide prevents biomass accumulation in fuel tanks, extends fuel filter life and inhibits microbial influenced corrosion.
- INCREASES LUBRICITY. As an added benefit, BioborJF has been proven to increase the lubricity properties of jet fuel, providing additional protection and reduced wear to fuel delivery components.
- OEM APPROVED. Proven to restore lubricity levels, exceeding ASTM standards and protecting injectors and pumps from premature wear. (ASTM-D6079 HFRR- engine manufacturer and industry standard testing).
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
