Choosing the right oil isn’t just a box to check on your maintenance list — it’s a decision that affects the performance, longevity, and total cost of ownership of your equipment. Whether you’re maintaining a single machine or managing a fleet, the oil you select plays a key role in minimizing downtime and maximizing efficiency.
At Amrocor, we work with everyone from mechanics to industrial buyers, and this guide walks you through what you need to know before placing your next order for lubricants or petroleum products.
1. Start with Your Application
It all begins with understanding what you’re servicing. Every system has unique lubrication needs — and using the wrong oil can have serious consequences.
Here’s a quick breakdown of common applications and the oils they typically require:
Equipment Type
Recommended Oil
Gasoline engines
SAE 5W-30, 10W-30 motor oil
Diesel engines
SAE 15W-40, 10W-30 HD
Hydraulic systems
ISO 32, 46, or 68 hydraulic oil
Transmissions
ATF or manual transmission fluid
Gearboxes and differentials
80W-90, 85W-140 gear oil
Not sure what your equipment needs? Start by checking the OEM specifications — or send us the model number and we’ll point you in the right direction.
2. Follow OEM Specifications — Always
Manufacturers don’t make oil recommendations lightly. Viscosity, formulation, additive packages — these are carefully matched to engine tolerances and working conditions. If you skip the specs or substitute a cheaper oil, you risk:
● Accelerated engine wear
● Poor cold start performance
● Oil breakdown at high temps
● Voiding your equipment warranty
At Amrocor, we carry oils that meet or exceed industry certifications like API, ILSAC, and various OEM standards. We’re happy to provide data sheets upon request.
3. Understand Viscosity Ratings
Viscosity tells you how thick or thin oil is at different temperatures. For example:
● 5W-30: Flows well in cold starts, good for passenger cars in moderate climates
● 15W-40: Designed for high-load diesel engines and equipment that operates under stress
The first number (e.g., “5W”) refers to cold-weather performance. The second number indicates how the oil behaves at operating temperature. Choosing the correct viscosity ensures proper lubrication under all conditions.
4. Choose Between Conventional, Synthetic, or Blends
There’s no one-size-fits-all answer here — your choice depends on your equipment’s demands, operating environment, and budget.
● Conventional oil is fine for older engines and low-intensity applications.
● Synthetic oil offers better stability at high temps, longer drain intervals, and cleaner engine operation — ideal for fleets or heavy-use equipment.
● Synthetic blends strike a balance between protection and price.
If you’re servicing equipment in extreme heat, cold, or long-duty cycles, full synthetic is often the smarter long-term investment.
5. Factor in Your Environment and Workload
Do your trucks run 8+ hours a day in stop-and-go traffic? Are your excavators operating in hot, dusty environments?
If so, you should be using an oil with high thermal stability, better detergents, and extended protection against oxidation and sludge. In many cases, upgrading oil quality pays for itself by reducing wear and extending service intervals.
6. Match Oil Type to Your Maintenance Schedule
● For short intervals (3,000–5,000 miles): Conventional oil can suffice.
For longer intervals (10,000+ miles or 250+ engine hours): Use synthetic or premium heavy-duty oils.
Our team can help you align your oil selection with your shop’s maintenance plan — whether you’re changing oil weekly or quarterly.
7. Buy in Bulk and Save
If you’re running a shop, servicing a fleet, or managing a warehouse, buying oil by the 55-gallon drum just makes sense:
● Lower price per gallon
● Fewer interruptions in your workflow
● Easier integration with bulk dispensers and fleet maintenance software
At Amrocor, we offer tiered pricing, distributor programs, and recurring delivery for high-volume customers.
Final Word: The Right Oil Isn’t Optional
Oil is the lifeblood of your equipment. Choosing the right one protects your investment, keeps your operations running smoothly, and saves you thousands over time. If you’re ever unsure, don’t guess — ask an expert.
At Amrocor, we don’t just sell drums of oil — we help businesses run better.
Need Help Choosing Oil?
Our technical product team is here to help you make the right call. Get in touch and let’s make sure your next drum is the right one.
