Mobil 1 FS X2 5W-50

MobilMobil 1 linepassenger cars5W-50

Synthetic full-SAPS 5W-50 of higher viscosity for high-performance cars without a particulate filter, with Porsche A40 approval.

Classification
Product line Mobil 1 21 oils
SAE viscosity 5W-50What SAE means
Base oil synthetic
Intended use passenger cars
API class What API means
ACEA class What ACEA means
Approvals
Manufacturer approvals What an approval means
Meets the requirements of
Typical properties
Viscosity at 40 °C 112 mm²/s
Viscosity at 100 °C 18.6 mm²/s
Viscosity index 185
HTHS viscosity 4.3 mPa·s
Pour point -39 °C
Flash point 225 °C
Base number (TBN) 13 mg KOH/g
Density 841 kg/m³

The car maker has not officially approved the entries in the “Meets the requirements of” row.

Mobil 1 FS X2 5W-50

Description

Mobil 1 FS X2 5W-50 is a synthetic full-ash oil in the Mobil 1 range with a higher viscosity, intended for high-performance petrol and diesel engines without a particulate filter. It is also designed to reduce oil consumption in high-mileage engines.

It holds official Porsche A40 approval; ExxonMobil only recommends it for MB 229.3 and Fiat 9.55535-M2, and it meets Lexus LFA Service Fill without formal approval. Categories: ACEA A3/B4 and A3/B3, API SQ, SP, SN Plus, SN, SM, SL, SJ and CF.

Typical figures: 18.6 mm²/s at 100 °C, viscosity index 185, HTHS 4.3 mPa·s, base number 13 mg KOH/g, pour point -39 °C. The drain interval does not exceed 20,000 km.

Application

High-performance petrol and diesel cars without a particulate filter, turbocharged or naturally aspirated, and petrol engines calling for a thicker oil of earlier API categories; drain interval no longer than 20,000 km.

Worth knowing

Mobil 1 FS 5W-40 and FS 0W-40 both hold the Porsche A40 approval, and they also have VW 502.00, VW 505.00, MB 229.5 and BMW Longlife-01, none of which X2 has. Both of those oils belong to a different viscosity grade: at 100 °C they have 13.2 and 13.8 mm²/s against 18.6 mm²/s for X2. So switching to them for the sake of a wider list of approvals is possible only where the car’s manual names both viscosity grades.

This oil has no Fiat approval: ExxonMobil merely recommends the 9.55535-M2 specification for engines that call for it. In the table in the article on Fiat 9.55535 codes, M2 sits among the full-SAPS specifications at ACEA A3/B4 level for 5W-40 oils, sometimes 0W-40, not 5W-50. So owners of a Fiat whose service book says M2 should check the viscosity it gives as well, not just the specification number.

Data current as of Check the label and the current product data sheet before you buy.

Sources

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