Join Date: Dec 2008
Location: norman, ok
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Here is what Ford recommends and temp scale in Fahrenheit
Normal usage (0*to 100*+) 10w-30
Biodiesel ( -20* to 100*+ ) 5w-40, or ( 20* to 100*+) 15w-40
Severe Duty usage 5w-40
The following operating conditions are considered severe duty service.
frequent or extended idling (over 10 minutes per hour of normal driving).
low speed operation/stationary use.
if vehicle is operated in sustained ambient temperatures below -23°C (-10°F) or above 38°C (100°F).
frequent low speed operation, consistent heavy traffic less than 40 km/h (25 mph).
operating in severe dust conditions.
operating the vehicle off road.
towing a trailer over 1600 km (1000 miles).
sustained high speed driving at Gross Vehicle Weight Rating (GVWR)
Another acceptable weight is 0W-30/0w-40 for all temps hot or cold
My motto: Be nice, be polite, but have have a plan to kill everyone that you meet.
94 F250 IDI turbo, auto 2wd.. ATS housing, 3" down, 4" exh, guages. 104k miles got totalled by a damn mustang (parts now).
98 12v, 4x4 quad cab. auto with BD T/C & V/B, Banks Big head, Exh brake, AFC modded, 16.5ish*, KDP gone, 60lb springs, 4K-GSK, BHAF, pyro, trans, and boost guages. 4" straight pipe,
72 AM General M35A2, LDT465-1C "Whistler" Turbo, PTO winch.