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