Many people like Mobil, as it makes very high quality engine oil. The Exxon-Mobil basestocks and Infineum (part of Mobil and Shell) additives are some of the very best in the industry.
Engine-oil blending is an art and there is always a compromise in choosing the ingredients. A pure PAO (Group IV) oil wouldn't be maximally thermally stable for example and it would also harm the seals and have poor solvency properties; therefore, either Group V or Group III (or II+) are mixed with PAO basestocks. There are also many different types of PAO and Group V basestocks available too choose from, complicating the blenders' job even more. Last but not least, a proper additive package is also crucial. Viscosity-index modifiers are also a very important part of oil blending, as a large quantity of low-quality viscosity-index improvers would result in an oil that would permanently shear to a much thinner kinematic and HTHS viscosity.
Here is the list of Mobil's Group IV PAO (SpectraSyn) and Group V Synesstic basestocks. Another Group V basestock line is Esterex, apparently a cheap, low-grade alternative to Synesstic, mostly available in US:
This is an example of Group IV and V blends of PCMO (such as Mobil 1):
An example of Group III and IV blend of PCMO (such as Mobil Super Synthetic or Pennzoil Platinum) or Group II+ and IV blend (such as Quaker State Synthetic Blend):
You can also formulate two-cycle-engine oils with synthetic basestocks:
Finally this is how you formulate small-four-cycle-engine (such as motorcycle engines) oils with Mobil synthetic basestocks:
Engine-oil blending is an art and there is always a compromise in choosing the ingredients. A pure PAO (Group IV) oil wouldn't be maximally thermally stable for example and it would also harm the seals and have poor solvency properties; therefore, either Group V or Group III (or II+) are mixed with PAO basestocks. There are also many different types of PAO and Group V basestocks available too choose from, complicating the blenders' job even more. Last but not least, a proper additive package is also crucial. Viscosity-index modifiers are also a very important part of oil blending, as a large quantity of low-quality viscosity-index improvers would result in an oil that would permanently shear to a much thinner kinematic and HTHS viscosity.
Here is the list of Mobil's Group IV PAO (SpectraSyn) and Group V Synesstic basestocks. Another Group V basestock line is Esterex, apparently a cheap, low-grade alternative to Synesstic, mostly available in US:
This is an example of Group IV and V blends of PCMO (such as Mobil 1):
An example of Group III and IV blend of PCMO (such as Mobil Super Synthetic or Pennzoil Platinum) or Group II+ and IV blend (such as Quaker State Synthetic Blend):
You can also formulate two-cycle-engine oils with synthetic basestocks:
Finally this is how you formulate small-four-cycle-engine (such as motorcycle engines) oils with Mobil synthetic basestocks:
