NEW Amsoil 5w-20 GF-4 Specs

[buster]

http://www.amsoil.com/storefront/xlm.aspx

Look like GF-4 took it's toll on Amsoil's XL line. So much like Mobil 1, it's clearly weakening the synthetic line but improving the dino/blend line.

HT/HS - 2.7
TBN -9
Noak - 10.7

They also changed the method of the Noak testing. Tooslick made a good point in that when you drop the Ca, which is what they did for Mobil 1 GF-4, Amsoil, GC etc, it lowers the TBN. Still good oils, but the specs have dropped much like M1 GF-4.

[ May 13, 2005, 04:39 PM: Message edited by: buster ]

 

[MN Driver]

When did they weaken the synthetic line, I wasn't even aware anything has changed with Amsoil synthetics. They are still SL grade all around. What changed?

 

[buster]

Oils are always changing. Reductions in Zinc and Phosphorus levels, two tried and true anti-wear additives, are being replaced. With that comes more expensive oils, however, it's hurting the synthetics to some extent. You'll now notice two Mobil 1's, a first ever, and you'll also see that the 5w-20 XL Amsoil has been weakend or downgraded from before. Both Amsoil Series 2000 and German Castrol have dropped the Ca levels in half and increased the Mg alot.