I present to you a modification that allows you to extract crude oil in FS25 and then process it into several derivative products.
Using an oil well pump and empty barrels, you will extract crude oil to the surface and then transport it on pallets to one of two refineries.
You can also sell the crude oil directly at a dedicated purchase point.
The big oil pump does not require empty barrels to be supplied; it only needs fuel and water for powering and cooling the pumps. You can collect the ready crude oil using a tanker or a small barrel, which is also included in this mod.
After delivering crude oil to one of the two refineries, you can refine it into diesel fuel, gasoline, LPG gas, engine oil, kerosene, paraffin, and bearing grease.
Once you have produced the finished pallets, you can transport them to three dedicated purchase points that you can set up.
At the small stall, you will sell smaller amounts of oil but at a higher price; in the other two purchase points, you can sell large quantities of pallets.
In picture number 2, you can see the entire oil production chain.
Fuel, gasoline, and LPG from the refinery can be transported in tankers, sold at the purchase points, and used to refuel vehicles.
Note! The oil well pump produces oil in pallets, whereas the big oil pump produces crude oil that you transport using tankers.

Oil well pump
Category: Production Sites
Price: $100,000
Daily upkeep: $50

Thundercreek FST 990
Category: Miscellaneous
Price: $29,500
Capacity: 3,750 L

Lizard MKS 8
Category: Barrels
Price: $25,000
Capacity: 8,000 L

Lizard MKS 32
Category: Barrels
Price: $90,000
Capacity: 32,000 L

Abi 550
Category: Barrels
Price: $5,850
Capacity: 2,080 L

Abi 1600
Category: Barrels
Price: $17,000
Capacity: 6,050 L

Big oil pump
Category: Production Sites
Price: $200,000
Daily upkeep: $50

Small refinery
Category: Production Sites
Price: $70,000
Daily upkeep: $100

Medium refinery
Category: Production Sites
Price: $150,000
Daily upkeep: $200

Average purchase of product sales
Category: Selling Points
Price: $40,000

A small sales stall
Category: Selling Points
Price: $4,000

Oil pump
Category: Power Generators
Price: $80,000
Daily upkeep: $50
Income per hour: $320

Crude oil Purchase Point
Category: Selling Points
Price: $10,000

I wish you a long fun with oil extraction and processing.
Write to me if you find any mistakes or if you need to improve the economy.