Mobilube PTX is a SAE 75W-90 multipurpose gear lubricant. It has been developed to provide outstanding performance specifically in Porsche 911 transaxles. It provides low temperature fluidity with high temperature stability ensuring excellent wear protection in these transaxles over a wide range of operating conditions.


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Data sheets

Features and Benefits

The combination of synthetic base fluid technology and special high performance additives have been carefully formulated to meet the low temperature fluidity requirements of Porsche. It also provides excellent synchromesh compatibility and 'shiftability', whilst maintaining excellent wear protection.

Mobil PTX provides the following benefits:


  • Excellent low temperature fluidity, giving easier gear changing from cold over conventional SAE 80W-90 and 75W-90 grades.
  • Excellent synchromesh compatibility / durability.
  • Good thermal /oxidative stability.
  • High level of wear protection under some of the most severe conditions.

Specifications and Approvals

MOBILUBE PTX 75W-90 has the following approval:  
Approved TE-ML 11 X


According to ExxonMobil, Mobilube PTX 75W-90 is of the following quality level:

Typical Properties

cSt @ 100ºC 14.5
cSt @ 40º C 77.6
Viscosity Index 195
Flash Point, ºC 226
Pour Point, ºC -60
Density kg/m3 849

Health and Safety

Based on available information, this product is not expected to produce adverse effects on health when used for the intended application and the recommendations provided in the Material Safety Data Sheet (MSDS) are followed. MSDS's are available upon request through your sales contract office, or via the Internet. This product should not be used for purposes other than its intended use. If disposing of used product, take care to protect the environment.