Originally Posted By: widman
Quote:
Richard. Of course, that's different than an ILSAC 5w-30. Also, out of curiosity, what kind of 5w-30 diesel oils were you intending, when you wrote this? Some years back, we did have 5w-30 dedicated HDEOs up here, like CI-4 or older (not some older CF thing with no minimum HTHS), branded as Esso XD-3, probably a blend, given its market position. Now, we see 5w-30 E6, E7, E9 CJ-4/SN synthetics up here, on occasion.
I was referring to, and have been using CI-4 up until now, when I got the GL-4+ that replaces the MTF.
Additives in the GL-4+ (at least in what I have, which I believe is the same formulation as Nissan and others)
Magnesium 1742
Calcium 16
Phosphorous 1316
Zinc 1099
Visc of 75W-85
@40 57.5
@100 11.9
Combination of group IV and V synthetics
Those are former generation formulae for dedicated MTFs'.
Quote:
A bit of formulating history may explain things a little.
Many years back, the only way to achieve a GL-4 rating was to use either a commercial additive package or mix your own. When I started out, I mixed my own individual components.
As far as commercial additives, the only way to do it back then was to take a sulfur-phosphorus EP gear oil additive package and use a treat rate of 1/3 to 1/2, and use a low treat rate of ZDDP as the primary anti-oxidant, and add the friction modifier.
Later, a special ZDDP-based package was offered with additional anti-oxidants, metal inhibitors, rust inhibitors, emulsifiers, and synchro friction modifiers. The HiTec 353 and the Lubrizol equivalent uses this combo.
Today, we use a special multi-funtional phosphate ester package that contains a powerful aminic-phenolic antioxidant, with added metal inhibitors, rust inhibitors, emulsifiers, and synchro friction modifiers.
What is a GL-4?