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FAQs

Q:I’ve heard that as long as you change your oil regularly, it’s okay to buy the cheapest oil possible. Is this accurate?

A.Some people equate cheap oil with the inexpensive cost of operation. But this is a myth. The minute a piece of equipment is filled with an oil, the oil leaves its legacy behind. When comparing a premium product to a cheap oil, the cheap oil would lead to higher wear rates and increased formation of deposit, varnish, and sludge – all leading to high maintenance costs and reduced equipment life. So, while the cheap oil may cost less to buy, a premium product will cost less to own.

Q:What do the numbers and the “W” mean in a motor oil identified as “10W-40″?

A.For a motor oil identified as “10W-40,” the first number that appears stands for 10 degrees Celsius; the “W” stands for winter. This means that the oil should function and start the vehicle properly when the outside temperature is 10 degrees Celsius (50 degrees Fahrenheit) during winter. The second number determines how thick the oil is while under the heat of a running engine. The higher this number, the thicker the oil will be under heat.

Characteristics of 5W-40 Motor Oil 5W-40 is a thin motor oil that will get to a vehicle’s moving parts easier and lubricate while trying to start it up. The “40″ indicates this is a bit thicker than the average motor oil, which is usually 30 for most cars, and it lubricates the engine more than average while it is hot.

Q?Is it true that the quality of an oil can be determined by its color or thickness (viscosity)?

A.

While an oil’s viscosity is an important characteristic, it actually does not say anything about an oil’s quality; nor does the oil’s color. To be sure you’re buying a quality oil just look at the bottle and ask yourself a few questions: Is the product a reputable brand? Do the industry and original equipment manufacturer specifications listed meet the needs of my equipment? Am I buying the oil from a reputable store or distributor? Is there a way to make sure I am buying an authentic product? If you can answer yes to all of these questions, you know you are buying a quality product.

Q?Why does it seem like every other year original equipment manufacturers or API/ACEA come out with new oil-performance standards?

A.Changing oil performance standards are directly related to continuously evolving emissions regulations. In an effort to obtain cleaner air, the trucking industry must abide by these governmental regulations. So they are constantly making design changes to their equipment, generally resulting in a harsher environment for the oil: higher temperatures, higher soot loads, or even the need to be compatible with after-treatment systems. Bottom line? Low emission engines need higher performing products. Therefore, when emissions regulations change, so do oil specifications. Even if you have an older engine that does not meet the latest emissions standards, it still benefits from oils that are formulated to the latest standards. Improved oil performance means improved engine protection for long engine life. And since oils meeting the newest specifications have better soot control and deposit protection, your engine will also get excellent protection against lost power, lost fuel economy, and increased oil consumption.

Q?What are the best practices for greasing intervals for fifth wheels?

A.Fifth wheel trailer mechanisms are subjected to a great deal of sliding and shock loading. Typically, fifth wheel surfaces should be coated with NLGI #2 grease before connecting the trailer. Since the existing grease on the surface has probably already collected dirt and other contamination, it should be cleaned before applying new grease.

Some fifth wheel mechanisms also contain a rack and pinion gear for positioning the trailer. These components often require special greases containing solids such as molybdenum disulfide or graphite so that the contact surfaces continue to be lubricated when the grease is squeezed out.

For most applications, we recommend Mobil Delvac Xtreme Grease. Mobil Delvac Xtreme Grease is a NLGI #2 lithium complex grease, designed specifically for use in severe on-road, heavy-duty trucking. It is particularly effective in rust protection. It also has tenacious sealing, tacky consistency in dry conditions, and resists water and spray off. This all results in a long-lasting grease — up to 50,000 miles in some long-haul fleets. Most important, its corrosion resistance is among the best in the industry, providing rust protection against various chlorides used commonly in today’s road salts.

Q:Is it practical to switch to synthetic lubes after running mineral oils for a long time?

A:Mobil Delvac synthetic lubricants are fully compatible with their mineral oil counterparts and it is practical to switch. The outstanding performance improvements of Mobil Delvac> synthetic products over mineral oils can be realized at all kinds of ambient temperatures. To realize these benefits, including improved efficiency and cost benefits, Mobil Delvac products are recommended to use all year round.

Q:Where and when should I use synthetic lubricants?

A:Regardless of whether you’re moving supplies in the frost of the Arctic, hauling trailers up and over mountains, or traveling in the heat of the desert, synthetic lubricants provide optimal protection in some of the harshest of driving conditions. Synthetic lubricants resist degradation at high temperatures better than conventional oils, leading to long oil life and reduced deposits, sludge, and varnish formation. At low temperatures, synthetic lubricants flow better than conventional oils, allowing them to reach components faster in order to provide quicker and better protection against wear. Synthetic lubricants are also more efficient than conventional oils, leading to lower friction during operation. This lower friction can be seen in improved fuel economy and lower operating temperatures, particularly in axle and transmission applications. In addition, many equipment builders endorse extended oil drain intervals when properly approved synthetic oils are used. In fact, many of world’s transmission and axle builders provide for an extended warranty for those using approved synthetic lubricants in their equipment.

Q:I’d like to use one grease for my truck. What should I look for?

A:For most applications, Mobil Delvac™ Xtreme Grease is recommended. It is a National Lubricating Grease Institute (NLGI) #2 lithium complex, designed specifically for use in severe on-road, heavy-duty trucking. It is particularly effective in rust protection. It also has tenacious sealing, tacky consistency in dry conditions, and resists water and spray off. This all results in a longer-lasting grease — up to 50,000 miles in some long haul fleets. Most important, its corrosion resistance is among the best in the industry, providing rust protection against various chlorides used commonly in today’s road salts.