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- Jul 2, 2007
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I would love to see a VOA comparison of these two. I bet they are the exact same formulation. Oddly XOM doesn't sell Racing 4T 15W50 in North America, only the 10W40 version and a 20W50 labeled as a Mobil 1 V-Twin.
Notice that on Mobil's US products spec sheet dated February 2016, Mobil 1 15W50 (page 2) and Mobil 1 Racing 4T 10W40 (page 3) both have identical quantities of Phosphorous (1200) and Zinc (1300). This leads me to believe that the Mobil 1 Racing 4T 15W50 sold outside of North America is likely the same formulation as "car and truck" Mobil 1 15W50 sold here. Note that Mobil 1 V-twin (page 3) is not the same, with much higher levels of Phos (1600) and Zinc (1750), levels that may cause problems with catalytic converts long term.
https://mobiloil.com/~/media/amer/us/pvl/files/pdfs/mobil-1-oil-product-specs-guide-2016.pdf
Notice that on Mobil's US products spec sheet dated February 2016, Mobil 1 15W50 (page 2) and Mobil 1 Racing 4T 10W40 (page 3) both have identical quantities of Phosphorous (1200) and Zinc (1300). This leads me to believe that the Mobil 1 Racing 4T 15W50 sold outside of North America is likely the same formulation as "car and truck" Mobil 1 15W50 sold here. Note that Mobil 1 V-twin (page 3) is not the same, with much higher levels of Phos (1600) and Zinc (1750), levels that may cause problems with catalytic converts long term.
https://mobiloil.com/~/media/amer/us/pvl/files/pdfs/mobil-1-oil-product-specs-guide-2016.pdf