The engine, as the heart of any vehicle, requires proper maintenance and protection to ensure that it runs smoothly and efficiently. The engine oils are made to give exceptional engine protection, ensuring that your engine runs like new even in the most extreme situations.
Mobil Delvac is fully capable of providing long engine life and excellent performance protection for truck engines and drivelines around the world in all situations since its inception in 1925.
It has established the standard for lubricating perfection throughout its history. It is one of the most frequently used heavy-duty engine oil brands in the world today, thanks to its commitment to research and technological advancement, as well as its global availability.
Shell Rotella T6 is compatible with practically all modern low-emission heavy-duty engines* as well as older diesel engines that perform hard.
It is a fantastic choice for on-highway fleets, general haul, construction, agriculture, public-transport operators, and diesel pick-up trucks due to its wide range of specifications and approvals from several of the world’s leading engine manufacturers.
Check out the Comparison: Rotella T4 vs T5 vs T6
Mobil 1 Turbo Diesel Truck is developed for modern, up to date diesel truck engines, enabling long drain capability along with greatly enhanced performance as well as considerable fuel savings.
Mobil 1 Turbo Diesel Truck 5W-40’s performance is an excellent product of substantial collaborative research work with key equipment builders and manufacturers, and the use of cutting-edge lubricating innovation.
| Specs | Mobil 1 Delvac | Shell Rotella T6 | Mobil 1 TDT |
| Oil Type | Full synthetic | Full synthetic | Full synthetic |
| Engine Type | Diesel | Diesel | Diesel |
| Available viscosity | 5W-40 5W-30 10W-30 15W-40 | 5W-40 0W-40 15W-40 | 5W-40 |
| ILSAC | GF-6 | GF-5 | GF-6 |
| Cost | $25.18 for 1 gallon. | $24.99 for 1 gallon. | $22.28 for 1 gallon. |
| Oil change frequency | 10000-15000 miles | 5000-7000 miles | 10000 miles |
Table of Contents
Which type of oils are these?
Mobil Delvac 1 is a full synthetic diesel engine oil that provides enhanced engine protection for modern vehicles with improved fuel economy as well as other related benefits like increased engine’s durability, protected emissions system, and enhanced draining capability making it a best choice for consumers. API CK-4, CJ-4, CI-4 PLUS, CI-4, CH-4, SN, SM criteria are met or exceeded.
The API SL criteria for gasoline engines used in mixed fleets is also met by this oil.
In difficult situations, the Mobil Delvac 1 makes use of cutting-edge technology to give superior performance, greater protection, and improved fuel economy potential.
Shell Rotella T6 is a complete synthetic heavy duty engine oil that is able to comfortably resist viscosity loss due to shear, allowing the heavy-duty diesel engine to retain ideal pressure.
It Multi-Vehicle 5W-30 is a multi-vehicle lubricant that can function well in both diesel and gasoline engines, allowing mixed fleet clients to consolidate their lubricants.
It full synthetic heavy duty engine oil has been strengthened with fully synthetic base oil and innovative additive technology to give protection against wear, deposits, and oil breakdown, as well as superior low temperature flow and fuel economy performance. It complies with API standards SM, SJ, SL, CJ-4, CI-4, CH-4, CF, and CI.
Mobil 1 TDT is a full synthetic diesel engine oil that helps to expand engine life while providing large drain capabilities for modern vehicles used in severe environments for the vehicle.
One motor oil for mixed fleet operations meets or surpasses the rigorous specifications of a major OEM. API CK-4, SL, SN, CH-4, CI-4, CI-4 PLUS, CJ-4, SM, Caterpillar ECF-3, and ACEA E7 and E9 are all met or exceeded by this product.
Looking at their Additives:
Oil additives are used to change the properties of lubricating oils so that they can protect car engines under all operating circumstances while effectively lowering emissions to prevent catalytic converter damage and extending engine oil life.
The amount of additives in oil can range from a few percent to more than 25%. Additive packages are meticulously constructed to ensure that motor oils meet API or ACEA regulations and are suitable for use in all engines that require oil that meets those set of requirements.
Mobil Delvac 1 is a totally synthetic oil made up of synthetic base oils and a sophisticated additive system. Phosphorus and zinc-based chemistries are the most extensively utilised anti-wear additives.
Anti-wear chemicals have multiple functions, including corrosion inhibitors and, more importantly, antioxidants. The most common detergent is a mix of calcium and magnesium-based detergents.
Detergent additives also aid in the prevention of corrosive wear by neutralizing acids generated as a by-product of combustion and other engine processes.
Shell Rotella T6 Full Synthetic Diesel Oil is designed to protect engines from harmful wear and sludge.
In heavy-duty diesel engines, sophisticated multi-functional dispersion additives in combination with synthetic base oils provide better protection against the impacts of soot, grime, and other pollutants.
The oil’s Energized Protection oil incorporates Shell’s own “Low-SAPS” additive technology, as well as an innovative and unique anti-wear system.
The durability of the product is further strengthened by the use of synthetic base oil technology, which increases additive activity to give low-viscosity fuel-saving performance without sacrificing endurance.
Key advantages include the following; compatibility with exhaust emissions control systems, protection in extreme operating temperatures, and fuel economy performance.
On the other side, the Mobil 1 Turbo Diesel Truck oil is designed with cutting-edge technology to help current low-emission engines run at their best.
The improved TBN quality reserve aids in deposit control and drain capacity extension. Mobil 1 Turbo Diesel Truck makes use of cutting-edge technology to help give outstanding performance in both modern low-emission engines, such as refrigerated units, and older, well-maintained engines. At extreme temperatures, the Mobil 1 Turbo Diesel Truck helps to maintain great performance. It’s also completely compatible with standard oils.
Do catalytic convertor perform better with them?
When a catalytic converter is exposed to exhaust containing chemicals that coat the working surfaces, the catalyst becomes encapsulated, preventing it from contacting and treating the exhaust.
Mobil 1 Delvac engine oils are high-performance, heavy-duty engine oils that have been proved to preserve diesel engines in harsh on-highway situations utilising low sulphur fuel.
These oils are engineered to meet the most stringent requirements of today’s high-output, low-emission automobiles, including those equipped with EGR, DPR, and catalytic converters, as well as earlier models.
Various innovations in the fields of engine design, fuel composition, and engine oil chemistry have been used to reduce exhaust emissions from diesel-fueled automobiles.
To improve combustor performance, higher fuel injection pressures, turbochargers, and EGR technologies are used.
Shell Rotella T6 contributes to the achievement of sustainability goals by being carbon neutral from the procurement of raw materials through the end of product life.
The formulation’s low sulphated ash, phosphorous, and Sulphur content aids in car emission compliance and engine fuel economy.
The low-ash formulation protects exhaust catalysts and particulate filters found in today’s low-emission automobiles.
However, because Rotella T6 contains 1049 ppm of phosphorus, it is probably not beneficial for the catalytic converter if your gasoline engine burns oil. Even when it had gasoline engine ratings, T6 was never good for catalytic converters.
The 505.01, 506.01, and 507.00 VW approvals are not present on the Mobil 1 Turbo Diesel Truck.
However, there appear to be UOAs arising from use in Volkswagen TDI pump dues (fuel injector model years 2004-2006) that demonstrate it may offer lower wear compared to VW spec 505.01 oils.
It also has a high amount of zinc and phosphorus, which may assist the PD’s cam and followers’ flat tappet design. Plus, it’s a strong 5W40, whereas some VW standard oils are now 5W30.
The increased phosphorous content of Mobil 1 TDT also has a long-term effect on the TDI’s catalytic converter.
Which oil keeps the engine clean?
Oil sludge which is often known as engine sludge, is a black, grease-like coating that accumulates on the combustion chamber of a gasoline engine.
Oil sludge is most commonly caused by missed car services or extended oil change intervals. Diesel engines can also produce oil sludge, though not as frequently.
Although the procedure is slightly different, diesel engines produce more unburned fuel and combustion soot. These pollutants accumulate over time, causing oil to thicken and sludge to form.
Mobil 1 Delvac is a low-ash synthetic engine oil that provides outstanding sludge and wear prevention as well as long engine life.
Increased thermal and oxidative stability reduces sludge build-up, deposits, and extends the life of the engine. The sophisticated piston deposit management keeps engines clean, resulting in lower maintenance costs and a longer engine life.
It also offers improved soot management to keep viscosity, sludge buildup, and filter pressure under control.
It has outstanding low-temperature performance, allowing more oil to flow to important bearing surfaces during starting and preventing low-temperature sludge development.
Shell Rotella T6 contains advanced multi-functional dispersant additives that, when combined with synthetic base oils, provide increased protection against the effects of soot, dirt, and other contaminants in heavy-duty diesel engines.
This oil has an ash-free formula that protects against soot and keeps sludge and deposits out of the oil. It’s just another approach to keep the oil flowing smoothly and fresh. For cold weather that causes oil to thicken and slow, the best option is a low-viscosity engine oil that can flow easily through the system’s moving parts. Shell Rotella T6 is effective.
Mobil 1 Turbo Diesel Truck oil is engineered to resist the formation of sludge, allowing it to maintain viscosity and prevent deposits.
The higher TBN quality reserve in Mobil 1 TDT aids in deposit control and drain capability. Its remarkable thermal and oxidative stability aids in the reduction of sludge build-up at low temperatures and high temperature deposits.
Its homogeneous synthetic oil molecules decrease friction, reducing the formation of high-temperature deposits and low-temperature sludge.
How they protect from Oil Burn-off?
The refined additives in Mobil 1 Delvac provides outstanding temperature stability and wear resistance.
It has low volatility, excellent wear, and bore polish control, all of which contribute to low oil consumption. Because Mobil Delvac 1 synthetic lubricants have greater oxidation and heat stability, they have less viscosity increase with age and better deposit control, which can lead to reduced downtime and save time and money.
For outstanding oxidation control and thermal stability, as well as excellent rust and corrosion prevention, Mobil 1 Delvac is made with high-performance base oils combined with ash-free dispersants, detergents, and inhibitors.
Shell Rotella T6 full synthetic heavy duty engine oil resists heat breakdown, giving you peace of mind throughout your service interval.
It resists viscosity loss due to shear and keeps the pressure in your heavy-duty diesel engine at optimum levels.
The resistance to viscosity loss guarantees that your engine is always protected. Additive packages are essential for keeping an engine clean and free of varnish and sludge, as well as providing wear protection and heat and acid resistance.
Low volatility, good thermal stability, and corrosion resistance are all features of Mobil 1 Turbo Diesel Truck synthetic motor oil.
Mobil 1 TDT demonstrates great management of oil breakdown and helps maintain consistent oil viscosity, reducing burn off at higher temperatures, thanks to its outstanding thermal and oxidative stability.
Do they save form Engine Wear-Off?
With the cutting edge innovation, Mobil 1 Delvac helps to give superior performance by reducing engine deposits and sludge development, as well as providing anti-wear and anti-scuff engine control.
It has outstanding low-temperature performance for increased oil flow to vital engine surfaces when the engine is first started.
A higher viscosity index means a more consistent viscosity over a wider temperature range.
These synthetic lubricants not only perform effectively at low temperatures, but they also resist thinning at higher temperatures, providing protection over a wider temperature range.
These lubricants are designed to reduce internal friction, resulting in improved performance.
Shell Rotella T6 5W-40 is a low-viscosity, completely synthetic engine oil that outperforms earlier API CI-4+ lubricants in terms of wear protection.
The oil is based on free-flowing synthetic base oils that allow for reliable pumping on start-up in cold climates while remaining thick enough to protect against wear in high-temperature operation.
This oil prevents viscosity loss due to shear and maintains proper engine oil pressure. High-quality engine oils, such as Shell Rotella’s, also safeguard engines from corrosive wear by neutralizing or halting acid formation.
Mobil 1 Turbo Diesel Truck synthetic motor oil is designed for hard-working diesel engines and provides superior wear protection, oil consumption control, and performance reserve.
This is a product designed to help turbo diesel engines last longer. It is compatible with Cummins, Power stroke, Duramax, and Navistar diesel engines.
With its shear stability, This diesel delivers exceptional wear protection and lowers oil usage.
Do they provide Engine Seal Protection?
A crucial component is the engine gasket. It aids with the efficient, safe, and cost-effective operation of the engine. Degraded engine gaskets, oil pan leaks, oil seals, and poor connections account for the great majority of leaks.
Mobil 1 Delvac offers excellent protection against oil thickening and degradation, reducing the number of oil changes and disposal requirements. Longer gasket and seal life is possible because to component compatibility.
There are no leaks with this oil. It is completely compatible with the elastomer materials used in the manufacture of vehicle seals and gaskets. If an older engine is in good working order and has no oil leaks, Mobil 1 Delvac offers the same benefits as a new engine.
The extended duration of heat cycles, longer service intervals, and the high cost of a diesel oil change make high-quality oil essential.
Shell Rotella T6 has a greater pour point than some other oils, which is the temperature at which the oil loses its flow characteristics, therefore it’s less prone to leak from worn seals or older engines.
Mobil 1 TDT a fully synthetic heavy-duty performance diesel engine oil with long drain capabilities that can help extend engine life.
Component compatibility has also been improved in Mobil 1 TDT to encourage long gasket and seal life, which helps to extend service intervals.
Mobil 1 motor oils are especially well suited to newer vehicles with oil drain intervals that can be extended or varied.
Which oil here gives better fuel economy?
Mobil Delvac 1 is the most innovative lubricant for today’s modern engines with emission improvement systems.
ExxonMobil created it in order to save money on gas while retaining excellent anti-wear performance.
The reduction in friction also minimizes the formation of deposits and wear while improving efficiency, allowing the engine to run on diesel for its lifetime duration.
These products, when used in conjunction across the vehicle, have proved to have potential fuel economy advantages of up to 1% over standard mineral lubricants, according to studies.
By the use of the most advanced technology of Shell, Shell Rotella T6 5W-40 offers optimized fuel economy, without compromising engine protection or durability.
When compared to 15W-40 oils, this is a significant improvement.
The focus on engine oil viscosity offers greater opportunities to realize fuel efficiency and therefore reduce the total cost of ownership through lubricant choice.
Its viscosity improves fuel efficiency by using less energy and minimizing friction. Its outstanding cold-start help in extending the vehicle’s starter and battery in cold temperatures.
Long-drain capability, great performance, and potential fuel economy are all features of Mobil 1 Turbo Diesel Truck.
Deposits and wear accumulate as equipment ages, resulting in a loss in equipment efficiency.
By reducing engine friction and providing superior flow characteristics at low temperatures, low viscosity completely synthetic engine oils can assist increase engine efficiency and improve fuel economy potential.
Looking at their Viscosity:
The Society of Automotive Engineers determines a lubricant oil’s viscosity grade (SAE). Oils can be divided into two types: multi-grade and mono-grade.
Multi-grade oils must meet two viscosity criteria; its viscosity grade is represented by two numerals, for example, 10W-40: The low-temperature viscosity (winter) is 10W, and the high-temperature viscosity is 40W. (summer).
Most automotive engine oils are currently multi-grade, with oils for restricted use.
Mobil 1 Delvac engine oil is available in SAE 5W-40, 5W-30, 10W-30, and15W-40 viscosity grade formulations.
Shell Rotella T6 is available in SAE 0W-40, SAE 5W-40, and SAE 15W-40 viscosity grades formulations.
Mobil 1 Turbo Diesel Truck fully synthetic motor oil is available in SAE 5W-40 viscosity grade.
Oil Change Frequency Comparison:
Mobil 1 Delvac offers an oil drain interval of up to 100,000 miles, with the possibility to go higher, which is 10,000 to 15,000 miles longer than existing CJ-4 and CK-4 intervals.
Shell Rotella synthetic diesel oil can last up to 500,000 miles or 10 years if used properly. Your engine will be more robust thanks to the heavy-duty synthetic oil.
The durability, on the other hand, is determined by driving habits and the severity of driving circumstances. If you’re using the oil on big machines like earth-movers, the oil drainage intervals will be shorter, about 5000 miles.
Mobil 1 motor oil must be changed at least every 10,000 miles or the OEM suggested oil change interval, whichever comes first, to meet the conditions of the Mobil 1 limited guarantee. The same may be said with Mobil 1 TDT.
In the end, let’s analyse their cost:
Mobil Delvac 1 ESP Heavy Duty Full Synthetic Diesel Engine Oil 5W-40 for 1 Gallon costs $25.18.
Mobil 1 Turbo Diesel Truck Full Synthetic Motor Oil 5W-40 for 1 Gal costs $24.99.
Shell Rotella T6 5W-40 Full Synthetic Heavy Duty Diesel Engine Oil for 1 Gallon costs $22.28.