Why does my ford f350 power stroke use so much oil every week? I see no leaks.

Blue smoke? Blue smoke forms when the engine’s lubricating oil is being burned, indicating worn piston rings, valve guides, or seals.

Thanks for the response. It doesn't smoke ,only in the mornings.

Try full synthetic heavy duty diesel engine oil. Synthetics have lower NOACK Volitility ratings, thus much less evaporation. Besides, your engine will last much longer, you will get better gas mileage, your engine will start easier in winter, and your turbo will last longer and perform better.

I use retella now ,I thought that that was there best for diesel engines. I ill try it. Thanks Don

Excellent choices are:

. Motorcraft® SAE 5W-40 Full Synthetic Diesel Motor Oil

. Mobil Delvac 1 5W-40

. Mobil 1 Turbo Diesel Truck 5W-40

. Delo 400 LE Synthetic SAE 5W-40

. Amsoil 5W-40: AMSOIL Premium API CJ-4 Synthetic 5W-40 Diesel Oil (DEO)