"The EPA mandated that for the MY '04 and newer cars and light duty
trucks, that the manufactures must warranty the performance of the cats
for 120K miles. Rather than boost the amount of rare earth metals in
the cats (reversing the trend going back for several years now) the
manufactures decided to require that the sulfur and phosphorous content
in the motor oil be reduced. This is basically why we now have the new
SM rated motor oils.
The only problem on the automotive side of things was that phosphorous
as well as calcium and moly are all great at reducing engine wear. The
formulation changes required to meet the new SM rates has therefore had
some side effects. One of which is that certain brands/weights of motor
oil, namely the so-called "Euro Rated" 0w-30, 0w-40 and 5w-40 weights,
which may have carried such manufacture's certifications as the BMW long
life -01 and MBZ 229.3 anti-wear rating before in their SL formulations,
have been forced to drop some of those certifications in their new
reformulated SM versions.
I fucking love this country sometimes. The EPA is really digging at the bottom of the barrel here and the rest of the world is laughing at us.
Can we get any stupider?
OHWAIT I MUST BE A COMMUNIST HOW ANTI-AMERICAN OF ME. DISCARD MY OPINION IMMEDIATELY AS I AM FROM THE RADICAL LEFT AND AM A GOD HATING FAG.