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Oil viscosity
When I was in the dealership today I was talking to them about oil viscosity. They told me they only use 10W 30 in the diesels. This is throughback from the 6.0 that ran poorly in cool weather on 40 wt.
They actually had not read the owners manual where it says that above 10 deg celcius or when towing you must use a 40 grade. They don't even have any 15W 40 in stock! Should ford not have put out a bulletin that the new engine runs fine on proper diesel oil?
For now I will just change my own oil, but I find this a bit disturbing. Is this cause the engine is really new and their guys haven't gone on courses for the new engine yet?
Rob
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08 6.4 F350 SC LB DRW
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