In an effort to gather additional information on Valvoline's claim that "Mobil 1 5W-30 does not meet minimum API SM or ILSAC GF-4 specification because of its inferior performance in the Sequence IVA wear test," JobbersWorld contacted Thomas R. Smith at Valvoline. Smith is Technical Director of Valvoline Lubricants and the author of a letter Valvoline went public with on November 20, 2008 that challenges Mobil 's claims.

Click below to view Valvoline's letter and Q&A to its customers, which is reprinted with Valvoline's permission.

Note: The publishers of JobberWorld do not represent or endorse the accuracy of Valvoline's claims, statements, or position in either its letter or associated Q&A.

Please note: Although the text of JobbersWorld's December 11, 2008 issue regarding Castrol's price decrease clearly noted it was a price decrease, the title of the story said "Increase" in error.

It should also be noted that the announced decrease does not apply to Castrol Industrial lubricants.

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