Start with the machines that must work after dark
List the diesel equipment that remains essential through winter: the tractor used for feeding, a loader clearing access, a chore pickup or a generator your operation depends on. A machine left unused for a while still needs a deliberate fuel decision before it returns to service. Work from each engine’s manual and the supplier’s description of the fuel already in storage, rather than treating a recent delivery as proof that every tank is ready.
Map the fuel path from the bulk tank through its dispensing filter to the equipment. Record which fuel each machine uses, the volume received and the treatment history. If an operation has separate storage for different uses, keep those records separate. Labeling helps the person who did not arrange the delivery understand what is in the tank before filling a tractor on a cold morning.
Illustrative chore: the loader cannot feed the next pen
Imagine a ranch loader parked at the edge of a yard after a mild afternoon. Its tank was filled from older bulk fuel, and the next shift begins before sunrise after a sharp temperature drop. The engine develops a suspected fuel-flow restriction just as feed needs moving. This example describes a plausible planning problem; it is not a claimed true story, a testimonial or a measure of how often failures occur.
The preparation opportunity was at the bulk tank and the equipment fill, before the cold soak. Once a restriction exists, the operator needs to identify its cause and choose a service response. Keeping the preventive and emergency procedures distinct makes it easier to decide whether another machine can complete the chore while the affected loader is inspected.
Winterize the delivery volume, not the stencil on the tank
A tank labeled 1,000 gallons may receive a smaller delivery because fuel remains inside. Establish the current level, available space and incoming amount before measuring additive. Calculate the delivery dose and account separately for existing untreated contents. Add preventive treatment before or during delivery, above the fuel’s cloud point, following the product label and the supplier’s mixing instructions.
| Fuel | Cold Flow (1 fl oz / 5 gal) | 4-IN-1 (2 fl oz / 5 gal) |
|---|---|---|
| 300 US gal | 60 fl oz | 120 fl oz |
| 500 US gal | 100 fl oz | 200 fl oz |
| 1,000 US gal | 200 fl oz | 400 fl oz |
All amounts come from the maintenance charts in AMSOIL G3526, April 2024, and G3525, January 2026. The table describes fuel volume; it does not prescribe an extra dose for weather severity. Use the tank-level input to check room for a delivery.
Calculate 1000 US gallons for this use
Make water and filter maintenance a separate job
Cenex’s October 28, 2025 winter preparation guidance identifies storage-tank water, sediment and dirty filters as issues to address before cold weather. Inspect and maintain your storage setup using its service instructions. An additive calculation cannot establish whether a tank contains water or whether a dispensing filter needs attention.
Keep the tank’s inspection and service record beside the treatment log. Write the product name, date, delivered gallons and measured dose where the next operator will find them. If fuel condition is uncertain, discuss testing or inspection with the supplier before assuming more additive will solve the problem. Check the equipment-side water separator and filters according to the engine manufacturer’s procedure as well.
Pails fit repeated deliveries; drums require a use plan
Cold Flow provides dedicated cold-flow treatment and is listed in 16 fl oz bottles and 5-gallon pails. 4-IN-1 combines cold-flow improvement with cleaning, lubricity and cetane functions; it also offers 55-gallon drums. These are the published packages used by the calculator. A larger container is stored inventory, not the dose for a single delivery.
Use the season mode to total expected fills across tanks or vehicles, then compare the leftover amounts in the package plans. Decide where the inventory will be stored and how individual doses will be measured. AMSOIL controls current package availability, checkout and shipping. Ask about your application if the purchase plan spans several machines; this page does not promise special business prices or fulfillment terms.
Keep Recovery for the machine that already has a problem
Read Diesel Recovery instructions before adding emergency supplies to the shop. The G2598 bulletin, April 2024, covers already-gelled fuel and tank-and-filter treatment. It is a different job from preventive dosing of the next winter delivery. Identify who has the correct tools and service knowledge for the affected machine.
Compare regional conditions for Fargo, Sioux Falls, Des Moines and Billings. Use the product comparison to assign each product a clear purpose in your fuel plan, with the timing guide available to everyone who receives fuel.
Farm tank and chore-machine questions
How much Cold Flow treats a 1,000-gallon farm delivery?
The official maintenance ratio gives 200 fl oz of Cold Flow for 1,000 US gallons. The same volume needs 400 fl oz of 4-IN-1 at its published maintenance rate.
Does a 500-gallon tank always need a 500-gallon dose?
Calculate the actual delivery and assess any existing untreated fuel separately. Tank capacity describes available storage, not necessarily the amount that needs treatment.
Should seasonal farm equipment get preventive treatment before parking?
Check the equipment manual, fuel condition and expected storage temperatures with the supplier. Cold Flow and 4-IN-1 must be added above the fuel’s cloud point; they are not the procedure for fuel already gelled.
Fleet or business questions?
Include the delivery volume, equipment mix and whether your question concerns prevention or an existing restriction. Email jl@syntheticoilhq.com.
Published and reviewed October 16, 2026. Treatment charts and package listings were checked against current AMSOIL information. Manufacturer directions govern application.