Posted: Mon Dec 31, 2012 8:36 pm Post subject: Engine oil level question.
I have an 05 Impala, 3800 motor, & it seems every time I get an oil change, they put in too much oil. On the dipstick there is a checkered area with 5 holes. The checkering ends at the top hole, but there is no "full" line like the trans dipstick has. It seems who ever puts in the oil, the level is almost 1 inch above the top hole. Is this correct? Do I have the correct dipstick in the car? The pt # on the dipstick is 12574823. My car is a 9C3, so it has all the oil coolers. Could all the oil from the cooler & lines be settling in the pan which would raise the level? So where is full supposed to show on the dipstick? GARY
Do you check the oil with the car hot or cold? When the fluid gets hot it will expand a bit. Usually 2 holes on the dipstick, so what could be happening is at the oil change place they put in 5 quarts which would put it half of an inch or so above the holes. The fill should be 4.5 quarts. Engine gets hot and the oil heats up and expands. Half a quart isn't a big deal...with a quart over full it might push some out the pcv valve. Could always start changing it yourself, on the 3800 its a cake walk, plus good time to rotate your tires whenever you change your oil (if you follow the oil life monitor).
It's not so high when it's hot, but when the engine cools down, all the oil comes down to the pan, & the level rises. I didn't get an owner's book with the car, so I didn't know the car takes 4.5 qt. I wanted to add a pint of STP, but that would raise the level even more. I would wait for the level to drop after a few thousand miles, but that doesn't seem to happen. GARY
That's exactly what I do when checking the oil. But I would think the oil cooler, & lines would take the extra pint of oil while the engine is running. First, I will make sure I have the correct dipstick. If anyone can look at their 3800 dipstick to check the part # 12574823, or I'll go to the boneyard tomorrow. GARY
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