Why is my car taking less engine oil to fill from an oil change?
I have a 2013 economy sedan, 70k miles. Fuel mileage has been a lot less than normal (32-34 combined to now 23-25). I just changed the engine oil for the second time since this has started happening. Manufacturer s book says it should take 3.8 quarts to fill. Last time that was too much so had to take some out: this time I only put 3.5 quarts and it was still showing too high on the dip stick so again had to take oil out. I have always changed my own oil so I know this is unusual. Spark plugs have been checked and air filter (k&n) also fine.
- The Football GodLv 73 months agoFavorite Answer
Sludge. Flush your oil the next 2 changes and se the difference. If it doesn’t come out, you can’t add it back without overfilling it.
- zipperLv 63 months ago
Also did you change the filter, that can hold up to a quart of oil depending on size and type.
- JJLv 63 months ago
Did someone hit something and cave the oil pan in some?
- 3 months ago
oil filter also contains some mount. are you flushing out oil filter or replacing the filter? book doesn't tell a lie, there should be something wrong with the dipstick or you are not emptying the oil sump completely.
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- JohnLv 43 months ago
Its obvious mr 'i always do it myself so its always perfectly done because somehow you "know" what your doing' and that's why you ask questions.
I can think of five answers for you right off the bat but I'll start with the easy one
Pull your dipstick measure it and tell me if its too long.
- RonLv 73 months ago
I'm sorry, I can't really tell the difference between 3.5 and 3.8 quarts. You should be more worried about that mileage drop
- GeoLv 63 months ago
I'd be more concerned about getting 10 Miles a Gallon LESS that overfilling the oil by 1/3 Quart. Different Filters have different Capacities. Just fill it to the Top mark on the stick. I'd pull a Spark Plug and look at it. It tells a story. Next time say what you drive, not an Economy Sedan
- thebax2006Lv 73 months ago
Are you changing the oil after the motor is warmed up?
- STEVEN FLv 73 months ago
You read the WRONG number and didn't account for the oil in the filter you didn't change.
Your comments to don_sv_az are FLAT OUT LIES in reaction to being caught making up BS.
- don_sv_azLv 73 months ago
Did you change the oil filter? It takes about 1/2 quart to fill the new filter.