Energy Conserving II

[oilguy3]

I know I read something about the Energy Conserving II rating and I know it use to be on the back of some GF-2 oils, what happened to it?

 

[TallPaul]

I think when they went to GF-3 they just dropped the "II" notation (and didn't bother with a "III"), figuring the energy conserving level was already indicated in the GF number.

 

[oilguy3]

So all Energy Conserving GF-3 (and presumably GF-4) oils are really Energy Conserving II?

 

[TallPaul]

Not sure this helps, but:

From one website (dated early 90s):

Engine oils categorized as Energy Conserving are formulated to improve the fuel economy of passenger cars, vans and light-duty trucks. These oils have produced a fuel economy improvement of 1.5 percent or greater over a standard reference oil in a standard test procedure. Oils meeting this requirement display the Energy Conserving label in the lower portion of the doughnut-shaped API Service Symbol.

Engine oils categorized as Energy Conserving II are formulated to improve the fuel economy of passenger cars, vans and light-duty trucks. These oils have produced a fuel economy improvement of 2.7 percent or greater over a standard reference oil in a standard test procedure. Oils meeting this requirement display the Energy Conserving II label in the lower portion of the doughnut-shaped API Service Symbol.

From another website:

After August1, 1997 only SJ oils will be designated as "Energy Conserving". The test for SH in combination with "Energy Conserving" and "Energy Conserving II" will not exist.