4000 miles ago there was a special on Chevron 15-40 that I couldn't pass up, something like $8 a gallon? Anyway had issues with romps, throwing "no boost detected" codes etc. when cold. Since temps are now in the teens and twenties, and having read other posts about Synthetics, I decided to go with the Motorcraft Semi-Synthetic 10-30. (also a special $80 lube, oil & filter). What a difference. Rotella also has a semi-Synthetic, so I think I'm going that route from here on out...

 

Where did you get the Motorcraft Semi-Synthetic?

 

One of the local tire places carries it in bulk. The Ford Dealership also carries it, but wanted $20 more for the oil change.

 

I haven't seen a 10W30 rated for deisels, All my local walmart and autozone carries is 5w40 syn, and 15w40 Dino. I use the MC semi syn in all my gas power vehicles, best value in motor oil, IMO....

 

Here are the specs:

Motorcraft® SAE 10W-30 Super Duty® Diesel Motor Oil


Usage

For light- and heavy-duty diesel engine applications
Particularly recommended for use in Ford vehicles equipped with Power Stroke® engines
Recommended for use in 7.3L and 6.0L Power Stroke® diesel engines down to -10°F (-23°C) and 6.4L Power Stroke® diesel engines down to 0°F (-18°C)
Designed for new-generation, low-emission diesel engines
Can be used in older engines where the manufacturer recommended API Categories CD, CF-4, CG-4, CH-4, CI-4 and CI-4 plus
Important note: Not for use in gasoline engines equipped with catalysts
Features
High-quality diesel engine motor oil for Ford diesel vehicles
Meets American Petroleum Institute (API) Service Category CJ-4, required for use in diesel engines designed to meet 2007 on-highway exhaust emission standards and requiring ultra low sulfur diesel fuel
Formulated with premium hydroprocessed base oils and unique additive technology
Satisfies Ford Motor Company warranty requirements, as well as those of most other domestic and import diesel engine manufacturers recommending an oil of this viscosity and category
Meets International and Caterpillar ECF-3 requirements
Provides excellent soot control
Protects against wear, deposits, rust, corrosion, foaming, sludge formation, high-temperature oxidation and thickening
Protects exhaust aftertreatment systems such as particulate filters
Provides excellent performance in older-generation diesel engines operating on high-sulfur fuel
Available in one-quart bottles or 55-gallon bulk quantities


Use of bulk oil is environmentally proactive and bulk quantities are available at substantial savings

 

Here is the link to the ford page:

Motorcraft® Motor Oils

 

Interesting story.
I used this in my truck for several years. I always ordered it through a dealership. I ordered several cases per order.
At one pick-up i just loaded it as they carted it out, paid the bill and went home. A week later i looked and realized it was not diesel oil.
I went back to swap it. After a long discussion the shop techs admitted to accidentally bringing me the wrong oil and they intentionally used the diesel 10-30 on car oil changes to conveniently get rid of it.
They had to reorder for me.
Do you think they notified any of the car owners?

Motorcraft® SAE 10W-30 Super Duty® Diesel Motor Oil

Usage

• ...
• Important note: Not for use in gasoline engines equipped with catalysts...

 

Sounds like deliberate indifference to me. Wonder if anyone's engine was damaged as a result...

 

I wonder how much that 0w-30 full syn is, that sounds like it would be AWESOME in the winter. CI-4/SM rated......

 

Just go to a FULL SYNTHETIC oil like Shell Rotella 5W40 (T6) the Motorcraft stuff is over-priced for a "blend"

 

I'm not convinced that 10w-30 is a very good choice, even in cold climates. Once the engine is fully warmed up, it's roughly the same temps regardless as lonh as the stat is working properly. It needs to act like a 40 weight oil when warmed up IMHO, hence the use of 5W-40. I know Blackstone really doesnt like to see oil samples shearing down to 30 weight and will tell you to change the oil more often if it does. Keep in mind that the Xw-30 oils will shear down to 20 weight or lower with use. I wouldn't want an oil that light in my truck...

 

It won't cause any damage to the engine however prolonged use of HD Diesel oils in gas car engines will damage O2 sensors and catalytic converters. If used for just one oil change I don't think it would do anything but shorten the service life of those emissions systems.