Mobil 1 is a leading global brand for synthetic engine oils, part of the ExxonMobil Group, and has been developing innovative lubricant solutions for decades. The ESP (Emissions System Protection) series was specifically designed for modern engines with exhaust aftertreatment systems, with ESP X3 launched in 2018 and ESP X4 launched in 2020. Choosing the right engine oil is crucial for engine life, fuel efficiency and compliance with strict emissions regulations in modern vehicles. This comparison analyses the two premium engine oils Mobil 1 ESP X3 and Mobil 1 ESP X4 to provide consumers with an informed basis for decision-making.
Excellent protection for diesel particulate filters and petrol catalytic converters due to low SAPS content (low SAPS formulation)
Excellent flow properties at low temperatures for fast engine starts even in extremely cold conditions
Extended oil change intervals in accordance with manufacturer specifications thanks to high thermal stability
Effective cleaning effect against deposits and sludge formation in the engine
Compatibility with a wide range of European diesel engines with state-of-the-art exhaust technology
Mobil 1 ESP X4 advantages
Optimised fuel consumption thanks to advanced friction minimisation technology
Exceptional engine protection performance at high operating temperatures and extreme loads
Extended compatibility with latest petrol and diesel engines including hybrid drives
Improved oxidation stability for consistent performance over the entire oil change interval
Specially formulated for Mercedes-Benz and other premium vehicle manufacturers with the most stringent requirements
Disadvantages: Mobil 1 ESP X4 vs Mobil 1 ESP X3
Mobil 1 ESP X3 disadvantages
Higher price compared to conventional mid-range engine oils
Limited availability in certain viscosity grades for older vehicle models
Not suitable for all engine types without specific low SAPS requirements
Mobil 1 ESP X4 Disadvantages
Premium price segment with higher acquisition costs than comparable products
Restricted manufacturer approvals for certain Asian vehicle brands
Specific requirements for oil change intervals must be strictly adhered to
Not downward compatible with all older engine generations
Comparison table of technical specifications: Mobil 1 ESP X4 or Mobil 1 ESP X3
Feature
Mobil 1 ESP X3
Mobil 1 ESP X4
Application
Passenger car diesel and petrol engines with DPF/GPF
Modern petrol and diesel engines, hybrid vehicles
Viscosity class
0W-30, 0W-40
0W-20, 0W-30
Quality grade
Fully synthetic
Fully synthetic
Vehicle type
Passenger cars, light commercial vehicles
Passenger cars, SUVs, light commercial vehicles
Engine equipment
Turbocharger, DPF, catalytic converter
Turbocharger, DPF, GPF, start-stop systems
API specifications
SN, CF
SP, SN Plus
ACEA specifications
C3
C2, C3, C5
Manufacturer approvals
VW 504.00/507.00, MB 229.51, BMW LL-04
MB 229.52, 229.71, Porsche C20, Opel OV0401547
Density at 20°C
0.842-0.850 g/cm³
0.838-0.846 g/cm³
Viscosity at 40°C
58-68 mm²/s
44-52 mm²/s
Viscosity at 100°C
11.0-12.5 mm²/s
8.5-10.5 mm²/s
Viscosity index
170-180
175-185
Flow point
-45°C to -48°C
-48°C to -51°C
Flash point
220-230°C
215-225°C
Similarities: Mobil 1 ESP X3 vs Mobil 1 ESP X4
Fully synthetic formulation: Both engine oils are based on high-quality synthetic base oils with advanced additive packages for maximum performance and engine protection.
Low SAPS technology: Reduced sulphated ash, phosphorus and sulphur content to protect modern exhaust aftertreatment systems such as diesel particulate filters and catalytic converters.
Excellent cold-start properties: Optimum fluidity at low temperatures ensures fast oil supply to all engine components during cold starts.
Extended oil change intervals: Both products enable extended maintenance intervals in accordance with manufacturer specifications thanks to high oxidation and temperature stability.
Fuel efficiency: Special friction modifiers help to reduce fuel consumption and thus lower CO₂ emissions.
Wear protection: Advanced additive technology offers excellent protection against wear, corrosion and deposits under all operating conditions.
European approvals: Compliance with strict European standards and manufacturer specifications for premium vehicles with the latest engine technology.
Differences: Mobil 1 ESP X3 vs ESP X4
Feature
Mobil 1 ESP X3
Mobil 1 ESP X4
Oil base
Synthetic PAO base with ester components
Advanced synthetic base with optimised friction modifiers
Main strength
Diesel particulate filter protection and longevity
Fuel efficiency and hybrid compatibility
Temperature resistance
High thermal stability up to 230°C
Extended thermal stability up to 235°C
Target group
Owners of European diesel vehicles with DPF
Drivers of modern petrol, diesel and hybrid vehicles
Product selection
Two viscosity grades available
Three viscosity grades for a wider range of applications
Manufacturer approvals
Focus on VW Group and BMW
Extended Mercedes-Benz and Porsche approvals
Performance optimisation
Focus on cleaning effect and DPF protection
Optimisation for fuel economy and start-stop systems
Conclusion
The Mobil 1 ESP X3 and ESP X4 engine oils both represent high-quality fully synthetic lubricants with specific strengths for different areas of application. ESP X3 is particularly suitable for owners of older European diesel vehicles with particulate filters who value proven technology and comprehensive VW/BMW approvals. ESP X4, on the other hand, is the ideal choice for drivers of the latest generation of vehicles, particularly Mercedes-Benz and Porsche, as well as hybrid vehicles where fuel efficiency and state-of-the-art engine technology are paramount. Both products offer excellent engine protection and justify their premium price with extended oil change intervals and optimised performance.
Frequently Asked Questions (FAQ)
Which engine oil is more suitable for diesel vehicles - Mobil 1 ESP X3 or ESP X4?
Both oils are designed for modern diesel engines, whereby Mobil 1 ESP X3 has been specially developed for European diesel vehicles with DPF and has VW 504.00/507.00 approval. ESP X4 offers extended compatibility with the latest diesel engines and additional Mercedes-Benz approvals. The choice depends on the specific manufacturer specifications of your vehicle.
Can I change from Mobil 1 ESP X3 to ESP X4?
A change is generally possible, as long as the ESP X4 has the necessary manufacturer approvals for your vehicle. Check the viscosity class and ACEA specifications in your operating instructions. ESP X4 is often the preferred choice for newer Mercedes-Benz models with MB 229.52 approval.
How do the oil change intervals differ between Mobil 1 ESP X3 and ESP X4?
Both engine oils allow extended oil change intervals according to manufacturer specifications, typically 15,000 to 30,000 km or 12-24 months. ESP X4 offers potentially longer intervals in modern engines due to its improved oxidation stability. Always follow your vehicle manufacturer's specifications.
Which oil offers better fuel economy - Mobil 1 ESP X3 0W-30 or ESP X4 0W-20?
Mobil 1 ESP X4 0W-20 is specially optimised for maximum fuel efficiency and offers lower frictional resistance due to its lower viscosity. Tests show fuel savings of up to 2% compared to higher viscosity oils. However, only use the viscosity grade approved by the manufacturer.
Are Mobil 1 ESP X3 and ESP X4 compatible with start-stop systems?
Both engine oils are suitable for start-stop systems, whereby ESP X4 has been specially optimised for the increased requirements of this technology. Mobil 1 ESP X4 offers improved protection during frequent cold starts and fast oil supply after engine shutdowns.
Which Mobil 1 ESP oil is suitable for hybrid vehicles?
Mobil 1 ESP X4 is the recommended choice for hybrid vehicles as it has been specially developed for the requirements of hybrid drives. It offers optimum protection under varying operating temperatures and frequent engine start/stop cycles. Nevertheless, check the specific manufacturer approvals for your hybrid model.
How do I know if my vehicle needs Mobil 1 ESP X3 or ESP X4?
Consult your vehicle's owner's manual and check the required ACEA specifications and manufacturer approvals. Vehicles with MB 229.51 or VW 504.00/507.00 can use ESP X3, while newer models with MB 229.52 or 229.71 approval require ESP X4. If you are unsure, please contact your specialist workshop.
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Parts Details
Capacity [litre]: 4
SAE viscosity grade: 0W-40
ACEA:
ACEA A3 / B4
API:
API SN, API CF
Manufacturer recommendations: AAE STO 003 B7, MB 229.3, MB 229.5, VW 502 00, VW 503 01, VW 505 00, Porsche A40, Fiat 9.55535-M2, Ford WSS-M2C937-A
3 February 2026 (updated) 
