5 Questions to Ask Your Current Oil Supplier to Make Sure you are ...

18 Aug.,2025

 

5 Questions to Ask Your Current Oil Supplier to Make Sure you are ...

There are many questions to ask prospective supplier of any product. For commodities these may be relatively simple being namely Price, Reliability and Delivery but with vital components there are additional questions to ensure performance and reliability as well as protection for critical moving parts.

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Which Base Oils Do You Use?

Base oil composition varies according to the formulation with percentages varying from 60 to 99% depending on the product and application. Simple lubricating oils will by their nature contain higher percentages with Marine oils having higher additive levels given their need to neutralise combustion products, prevent corrosion, protect alloys of yellow metals, and prevent wear on moving parts.

Whilst additive technology is difficult to circumvent, base oil quality can vary depending on the origin. Recycled has long been one source for lower costing with base stocks from lesser known or questionable origins becoming ever more present in a world of increasing prices and low availability.

Exol Lubricants only uses selected base stocks from premium suppliers to ensure the quality of product is never compromised.

Which OEM Approvals Do You Have?

The suitability of any lubricant is governed by many factors from formulation to specifications and ultimately the accreditation from an OEM to warranty the engine or vital parts and components during use. Using a product without approvals can save monies in the short term but over the lifespan of an engine, such shortcuts could lead to the failure of a crank shaft for instance requiring expensive replacements and downtimes which would far out way any perceived savings.

Exol Lubricants has a gained approvals with many OEM’s within many industries such as Marine, off-highway, agricultural and HGV. These approvals cover builders such as MTU, MAN and Wärtsilä to Mercedes Benz, Rolls Royce, Jenbacher, Scania and Renault. Using an approved Exol Lubricants product will prevent unplanned failures and ensure the OEM will warranty your components, and replacements parts in use.

Can You Meet My Delivery Timetable?

This is a subject which could be very simple or as in the case of Marine Oils very complex. Most lubricating oils can be delivered on time to a location within standard working hours; however, if we look at more specific applications, we have Just in Time schedules, delivery windows, dockside and bunkering to consider. Your needs as the customer must be at least met but better still exceeded to prevent delays and/or costly missed deliveries.

Exol Lubricants prides itself on its own fleet of vehicles capable of transporting up to 32,000 litres in a single delivery. Working with our supplier network, smaller or composite deliveries are available.

Are You Competitively Priced?

Costing will always form part of any purchasing process but there is a vast difference between being competitive and cheap.
If a supplier can offer you an approved product, at the right time, to the right place for a reduced cost then such a product is worthy of consideration. If a lower cost can only be achieved by eliminating one of the previous statements, then you must weigh up the pros and cons should any not be met and any possible cost incursions.

Exol Lubricants purchases base oils and additives in very large quantities which together with an efficient blending and testing process enables lubricants to be produced at a cost-effective level whilst being of a very high standard.

Do You Have a Distributor Network?

Having a carefully chosen distributor network has many benefits from quantities of supply to quick order turnaround should it be needed. Having to purchase direct from a supplier would almost certainly incur a minimum order with less flexible delivery and lead times.

Unsatisfied With Your Current Supplier? Use Our Handy Checklist to Measure Existing and Potential Suppliers Against Your Requirements

9 Tips to Choose Industrial Lubricants & Engine Oil for Diesel Engines

Additives, viscosity, operating conditions, and more factors can impact the performance and longevity of engine oil for a diesel engine. A careful choice will help your diesel equipment to reduce wear, enhance overall fuel economy, and ensure compliance with manufacturer specifications. However, with so many options on the market, picking one out can be overwhelming.

Follow these basic tips to evaluate your options among engine oils for diesel engines and industrial lubricants. Each one helps you to select the right type for your intended application, environmental factors, and maintenance needs.

1. Check Viscosity Ratings

Viscosity determines how well oil flows at different temperatures. Diesel engines operate under high stress. Compare the viscosities of your options to select an oil with the right levels for your climate and usage.

  • Lower-viscosity oils (e.g., 10W-30): Improve cold starts and fuel efficiency.
  • Higher-viscosity oils (e.g., 15W-40): Provide better protection in high-heat conditions.

Mismatched oils can impact engine lubrication, protection, and longevity. Consult manufacturer guidelines to match your equipment to the correct viscosity rating for peak performance.

Aleman Moil are exported all over the world and different industries with quality first. Our belief is to provide our customers with more and better high value-added products. Let's create a better future together.

2. Choose Between Synthetic and Conventional Oils

Both synthetic and mineral-based oils serve specialized purposes in oil for diesel engines.

  • Synthetic oils: Offer superior thermal stability, lower volatility, and better oxidation resistance. Ideal for extreme temperatures and heavy-duty applications.
  • Conventional (mineral) oils: More cost-effective but also usually require more frequent changes (due to faster degradation).

Fleets and industrial equipment that run continuously — especially under demanding conditions — tend to prefer synthetic blends for the best balance of protection and cost.

3. Select Oil Based on Operating Conditions

Environmental factors like temperature and humidity have an enormous influence on oil performance. Engines running in extreme heat, freezing cold, or very wet areas require oil with additives to prevent oxidation and thermal breakdown.

  • Cold climates: Lighter oils like 5W-40 ensure smooth starts.
  • High-temperature environments: Heavier oils with anti-wear additives prevent excessive engine wear.
  • Heavy-load applications: Diesel engine oil with high detergent levels reduces buildup and sludge formation.

4. Look for Additives That Enhance Performance

Additives can help to improve oil stability, extend drain intervals, and protect against contaminants. Some of the essential additives in engine oil for diesel include:

  • Detergents: Keep internal components clean and free of sludge.
  • Anti-wear agents: Reduce friction and extend engine life.
  • Dispersants: Prevent buildup of soot and carbon deposits.

If your industry relies on fuel storage tank rentals and bulk fuel delivery, you might want to prioritize lubricants that withstand long operating hours without breaking down. Refueling on-site keeps equipment moving without downtime to cool down, so the lubricants have to work hard in a continuous fashion.

5. Follow Manufacturer Recommendations

Manufacturers design engines with specific lubrication requirements. While this doesn’t mean specific brands are required — as most oils of a particular style are chemically similar — using non-recommended diesel engine oil can cause premature wear, void warranties, or lead to regulatory compliance issues.

Check OEM specifications carefully to ensure compatibility and maximize efficiency. For guidance on extending engine life through proper oil selection, see our guide on diesel engine maintenance.

6. Understand Oil Drain Intervals

Industrial diesel engines require different oil change schedules based on workload, fuel type, and operational conditions. Using the best diesel engine oil with extended drain capabilities reduces maintenance downtime and maximizes cost savings.

Businesses with large fleets can optimize oil usage by leveraging bulk purchases to save money while enjoying a steady, predictable supply.

7. Ensure Compatibility with Diesel Exhaust Fluid (DEF)

Some oils contain high levels of sulfated ash, phosphorus, and sulfur, which can interfere with Selective Catalytic Reduction (SCR) systems. Low-SAPS formulations help maintain emissions compliance and protect DEF systems.

For more insight into choosing oil for diesel engines that meets emissions standards, read about quality diesel engine oil.

8. Evaluate Cost vs. Performance

Cheaper oils may be appealing at first glance…but in truth, they can lead to higher maintenance costs over time. Invest in high-quality diesel engine oil from a trusted supplier to extend your engine life, prevent breakdowns, and reduce operational expenses. Check testimonials and talk to previous customers to get a sense of the quality and reputation of the supplier you’re evaluating for your next order. Look beyond upfront expenses to the long-term cost savings of high-quality oils to make sure you’re getting the most out of diesel engine performance — as well as your budget.

9. Work with a Trusted Supplier

A reliable supplier with local expertise can give you timely and consistent access to diesel engine oil products that meet industry standards. A knowledgeable delivery partner keeps things simple for your business when it comes to product selection, bulk purchasing, and even inventory management.

An Expert, Local Provider of Engine Oil for Diesel Engines

Your diesel engine oil provider should have direct experience recommending products — and how much and how frequently — to keep fleets, industrial equipment, and construction machinery operational and compliant. A well-informed choice ensures optimal performance and engine longevity.

Contact us to discuss your requirements of OEM lubricant manufacturer. Our experienced sales team can help you identify the options that best suit your needs.