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Unread 06-01-2008   #1 (permalink)
IhaveadopeGT is offline Made Member

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Default Oil Capacity on a 2003 Mustang GT?

Hello,

I was doing some homework trying to find out just how many quarts of oil the 4.6L takes. I came across several different numbers, most websites claimed 6 quarts, others 7 quarts. I also ran into a contractor at work who told me he also has a 2003 GT he's modifying. He claims to run the car about 1/2 quart low because it creates more power. This being some of the biggest ******** i've ever heard(my other car is a supra and running low oil there the first thing I'm looking at is my bearings going out followed by a rod or two). Has anyone ever heard such talk about the 4.6? I'm not going to be the first to try but I'm curious if this guy was just high or if anyone is actually doing this.
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Unread 06-01-2008   #2 (permalink)
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Maximum capacity of a 2003 4.6 is 6qts unless you have an after-market pan. The half quart low thing isn't going to give you maximum horsepower. Maybe closer to a full 2 quarts or on the minimum line of your dipstick. It's an old racers trick it keeps the crankshaft from spinning in oil reducing windage.
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Unread 06-01-2008   #3 (permalink)
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It's 6 quarts but I put 5 and a half when I do my oil changes.
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Unread 06-01-2008   #4 (permalink)
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Okay cool, I wasn't sure so I picked up 10 quarts of Mobile 1 5w20 Synthetic. Never hurts to have extra oil on hand anyway.
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Unread 06-02-2008   #5 (permalink)
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when my Gt still had the stock 5qt pan on it, I too would race it a quart low to help cut down on crankshaft windage and even later on wth my Canton 7qt oil pan and full length Canton windage tray, I only ran 6 qts of oil in the pan....
 
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