Engine Oil Specifications - Ford Diesel 2011 Supplement Manual

Maintenance and Specifications
6. it is best to maintain the oil level
within the crosshatch area on the
dipstick by adding oil as required.
The lower hole is the minimum oil
level and the upper hole is the
maximum oil level. Do not overfill.
The distance from the lower hole
(oil minimum) to the upper
crosshatch area on the dipstick represents 1.0 quart (.95L).

Engine oil specifications

To help achieve acceptable engine performance and durability, it is
important that only engine oils of good quality are used in your diesel
engine and it is changed at the recommended interval. For normal or
severe service, use Motorcraft oil or an equivalent oil conforming to
Ford specifications as listed in the Maintenance product specifications
and capacities section in this chapter or API service categories CJ-4 or
CJ-4/SM. It is important to use these oils because they are compatible
with the emission control equipment of your vehicle to meet the more
stringent emission standards.
The use of correct oil viscosities for diesel engines is important for
satisfactory operation. Determine which oil viscosity best suits the
temperature range you expect to encounter for the next service interval
from the following SAE viscosity grade chart.
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2011 Diesel (eco)
Supplement, 5th Printing
USA (fus)