Lost 3 qts of oil in 360 miles. oil filler has vacuum, but no blow-by evident. 1998 4.7 V8. Where did the oil go. No exhaust smoke.

Asked by Feb 28, 2017 at 10:57 AM about the 1998 Ford E-150 XL Club Wagon

Question type: Maintenance & Repair

Had been using oil at manageable level, but suddenly lost 3 qts of oil in 360
miles, after oil change. No oil filter leak or pan plug leak. Oil filler has vacuum,
and no blow-by evident.  1998 4.7 V8.  Where did the oil go.  No exhaust
smoke.

4 Answers

79,795

Check the PCV to make sure it is operating properly. If you lost 3 quarts in 360 miles there will be signs somewhere so look around. You may want to pull a spark plug to see if it is oil fouled and also check the end of the tail pipe for oil. Look in the radiator coolant also.

79,795

If you had a oil change shop do the work are you sure they filled it up to begin with?

I did it and, it was full

79,795

The oil went somewhere so all I can say is look around.

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