I know I have read this on here but some people have conflicting answers. I have a 1979 f150 4x4 with a 400 6.6liter original engine. Some says it holds 5 quarts of oil, also read 5.5 and 6. The majority said 6 so I went with that. I've only owned the truck a couple of months. After filling it with 6 quarts, the reading on dip stick is 1/2 inch higher that full mark. Maybe a little more. There's no water in oil. It is pure black after 50 miles of driving. Oil pressure gauge doesn't work, but I have developed a valve cover gasket leak and a leak behind the intake manifold. It may be the oil sending unit leaking. Will change. The dip stick says Ford on it, so I'm assuming is original dip stick. Has anybody had this issue? Thanks

 

Should not be black after 50 miles. Does the oil smell like gasoline? How does the truck run? My oil still looks new after about 2k miles in a new motor. I've had several 400s all took 6 qts with the proper FL1A oil filter

 

The truck has mechanical issues. I'm working on it. The oil does not smell like gas. Just oil. It does burn gas because of carb issues. Black smoke.

 

Takes 5 quarts of oil, 6 quarts of oil with a filter change.

 

Yes I filter changed. Thanks

 

Is it possible that, like my jeep, 4x4 models hold more oil than 4x2s?

Never mind, just read that he has 4x4 so if that were true then the higher oil capacity would be a non issue...

 

Fix your carb issue first, it's related to the black, over full oil and u could be damaging your bearings

 

Number Dummy. What's the correct dipstick number?

People keep telling me 5 qts. with a filter but it has always taken 6.

If your carb is dumping gas down the intake it will wind up in the oil and ruin it and your bearings.