Capabilities of Various Oil Ratings

[Gene K]

Does anyone know the capabilities of various oil ratings?

For instance based on CAT oil change requirements:
(They prefer you go buy fuel consumption instead of mileage)
CF-4: 70 gal of fuel use per quart of oil
CG-4: 75 gal of fuel use per quart of oil
CI-4: ?
CI-4 Plus: ?

In otherwords given a Hypothetical Truck with 10 Qt Oil capacity and 16 MPG average:

CF-4: 70 x 10 x 16 = 11,200 mi
CG-4: 75 x 10 x 16 = 12,000 mi
CI-4: ?
CI-4 Plus: ?

I wonder how much better CI-4 and "CI-4 Plus" are than CG-4?

I wonder about something along the lines of:
CI-4: (80) = 12,800 mi
CI-4 Plus: (85) = 13,600 mi

Thoughts?

Gene

 

[heyjay]

Gene:

To throw a monkey-wrench into that, the CI-4 and CI-4+ also have to deal with increased soot loading from mandatory emissions requirements in HD diesel motors. Eg: EGR.

So, depending on application, the CI-4+ may provide much better overall engine protection, but no increase in OCI.

 

[Shannow]

Gene,
interesting "rule of thumb".

My Nissan specifies CF-4, and has a 5 quart sump.

Your figure gives a 12-15k km OCI.

Nissan specify 10,000km.

 

[Gene K]

My "rule of thumb" is actually CAT's but it is for USA "Low Sulphur" Fuel. I am not sure how this relates to "High Sulphur" Fuel or the "Ultra Low Sulphur" European Fuel or what category Australian Fuel falls into.

Gene

 

[Shannow]

Gene,
(I think) Oz dropped it from 500 to 50ppm, making it low sulfur, and there is to be a new spec out soon to go the next step.

Doug can sort me out if I'm wrong.

Amazing to see the piles of sulfur around Newcastle.

 

[Stinky Peterson]

Don't know if you know about these links or not:

Cat Fluids Recommendation

Fluid Data Sheets

Fluid Specifications