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Old 09-27-2010, 01:34 AM   #1
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Question 4.6 2002 burning oil.

My 2002 GT has 78K miles and I believe it burns a little oil. Is this normal for this engine and that many miles. I think not. But I wanted to hear what you guys had to say. Thanks for the feedback.
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Old 09-27-2010, 07:21 AM   #2
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Re: 4.6 2002 burning oil.

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My 2002 GT has 78K miles and I believe it burns a little oil. Is this normal for this engine and that many miles. I think not. But I wanted to hear what you guys had to say. Thanks for the feedback.
Not normal in my opinion. Although, it happens.

The next time you change the oil watch the level on the dipstick for a few weeks. Every morning when you go outside check the oil level (once a week) to see if it drops. If so I would have someone watch you on the initial startup for the day, if the vehicle smokes on this start and not later in the day I would check the vavle seals.
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Old 09-27-2010, 08:18 AM   #3
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Re: 4.6 2002 burning oil.

Why do you think its burning oil? Any signs of oil leaks under the car?

Exactly how much oil is disappearing? Over how many miles?
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Old 09-27-2010, 10:48 PM   #4
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Re: 4.6 2002 burning oil.

Thanks for the prompt response. First, I would say that the oil level on the dipstick is minimal (about 1/4 quart, if that) but it happened over a few hundred miles (between 2 and 4) and there's no sign of leakage on the floor. I will check for that initial start up tomorrow morning to see what happens. I'm not too worried about it, but more concerned. I thought it was a little odd. I'll keep you guys posted.

Thanks again.
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Old 09-28-2010, 01:17 AM   #5
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Re: 4.6 2002 burning oil.

That small an amount of change on the dipstick could be anything from the dipstick not seating right, to being parked on a minimal incline. Next time you change your oil, start the car, shut it off.. Pull dipstick tube out, wipe it.. rein-insert, pull out again. mark oil level w/permanent pen.. 1000 miles later, repeat.. It doesn't sound like you're losing enough to worry about..
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Old 09-28-2010, 04:16 PM   #6
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Re: 4.6 2002 burning oil.

I put a little scratch on it last night and no smoke came out during start up this morning. I'll watch it for the next 1,000 miles like you said. I also used the 5W-20 Synthetic Blend that Motorcraft makes. Walmart carries it really cheap. A 5Qt. container for $12. Should I change to something thicker due to the miles or should I stick with the Motorcraft.

Thanks for all the feedback.
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Old 09-28-2010, 04:41 PM   #7
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Re: 4.6 2002 burning oil.

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Originally Posted by tonyjuan View Post
I put a little scratch on it last night and no smoke came out during start up this morning. I'll watch it for the next 1,000 miles like you said. I also used the 5W-20 Synthetic Blend that Motorcraft makes. Walmart carries it really cheap. A 5Qt. container for $12. Should I change to something thicker due to the miles or should I stick with the Motorcraft.

Thanks for all the feedback.
Motorcraft is the best oil you can use in this car.
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Old 10-03-2010, 01:08 PM   #8
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Unhappy Re: 4.6 2002 burning oil.

Just wanted to give you an update on this problem. I drove the car to work, about 60 miles roundtrip and check the oil the next morning. Sure enough, there was a noticeable amoung of oil missing on the dipstick. I know I have a problem. I love this car and I'm stuck with it because I just bought it. No wonder I got it so cheap. I now have to work on the solution. I'm open to all suggestions. Maybe one of you can tell me what my problem is. Rings, or whatever the common problem is with these motors. Maybe I should use a thicker oil as a temp. fix. I'm going to take it to a mechanic and get it checked out, which is what I should've done before I bought it. Again, I have to work on the solution, so I want to hear what you guys have to say first.

Thanks for everything.
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Old 10-03-2010, 05:11 PM   #9
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Re: 4.6 2002 burning oil.

You are refilling with six quarts at oil change, aren't you.
My 2010 manual calls for six quarts.
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Old 10-03-2010, 06:40 PM   #10
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Re: 4.6 2002 burning oil.

Yes. If it's not smoking, passes smog with flying colors, runs really well, doesn't leak. Is it possible that it would burn oil? and under what circumstances?...bad rings? I'm really puzzled here.
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Old 10-04-2010, 12:43 AM   #11
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Re: 4.6 2002 burning oil.

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Yes. If it's not smoking, passes smog with flying colors, runs really well, doesn't leak. Is it possible that it would burn oil? and under what circumstances?...bad rings? I'm really puzzled here.
Its entirely possible.. 1QT every 1000 miles is considered acceptable oil consumption by basically every automotive manufacturer.. I think its higher for BMW/Porsche and Benz
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Old 10-04-2010, 09:20 AM   #12
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Re: 4.6 2002 burning oil.

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Its entirely possible.. 1QT every 1000 miles is considered acceptable oil consumption by basically every automotive manufacturer.. I think its higher for BMW/Porsche and Benz
+1 Our test while I worked at Chrysler, Acura, Mercedes, and Ford all allowed for 1000 mile 1 qt consumption. Keep an eye on it. If it goes any worse then you need to work on selling the car. Clean it up and flip it.
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Old 10-04-2010, 11:00 PM   #13
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Unhappy Re: 4.6 2002 burning oil.

It's hard to believe that 1 qt of oil per 1000 miles is acceptable, but you worked for those folks, so I take your word for it. I guess you can expect one bad apple in a batch. I've met people who own the same car and they say theirs doesn't burn any oil. I'll be vigilant on the dipstick and will flip it if I have to. Too bad. It's such a nice car. On second thought. Could it be bad rings. If so, what's the approximate cost for an overhaul. Yeah, tell me about overhauling. If it's around $1000 to $1500, it's probably worth it. Considering the condition of the car and its value. Does that sound like a reasonable thing to do?

Thanks for the info. It was very useful.
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Old 10-05-2010, 08:44 AM   #14
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Re: 4.6 2002 burning oil.

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Originally Posted by tonyjuan View Post
It's hard to believe that 1 qt of oil per 1000 miles is acceptable, but you worked for those folks, so I take your word for it. I guess you can expect one bad apple in a batch. I've met people who own the same car and they say theirs doesn't burn any oil. I'll be vigilant on the dipstick and will flip it if I have to. Too bad. It's such a nice car. On second thought. Could it be bad rings. If so, what's the approximate cost for an overhaul. Yeah, tell me about overhauling. If it's around $1000 to $1500, it's probably worth it. Considering the condition of the car and its value. Does that sound like a reasonable thing to do?

Thanks for the info. It was very useful.
Unless your goal is to get more power out of it, kind of pointless to waste $1000-1500, especially if the car runs great. A quart of oil is pretty cheap.. you could buy a lot of oil with that..

Another thought is try a slightly heavier oil - maybe 5w30 (if you're using 5w20) or 10w30 if using 5w30.. Some people disagree with this if your car calls for something else, but I don't see it harming your engine and any performance loss to drag wouldn't be noticeable..
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Old 10-05-2010, 09:39 PM   #15
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Re: 4.6 2002 burning oil.

You make a lot of sense. I just did the math and according to what you said about 1qt per 1k miles being acceptable, I counted just over 600 miles since last oil change and what I had to add was less than a 1/4 of a qt. so it is not all that bad. In the mean time, I keep my eye on that dipstick. I'll write again if I need to.
Thanks again.
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Old 10-06-2010, 12:56 AM   #16
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Re: 4.6 2002 burning oil.

Just curious is it manual or auto, because my 79 had a bad problem with leaky valve seals that only seemed to leak when going down hill or gearing down using the engine as a brake to slow down. It would build up more vacume then when it was idleing thus pushing oil past the valve seals. I don't know if thats your problem but sounds like the same thing to me. Also never seen any smoke but would smell oil when going down a long hill.
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Old 10-06-2010, 08:08 PM   #17
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Re: 4.6 2002 burning oil.

That's a good piece of info. I'll keep it in mind.
Thanks.
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Old 11-23-2010, 03:21 PM   #18
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Re: 4.6 2002 burning oil.

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My 2002 GT has 78K miles and I believe it burns a little oil. Is this normal for this engine and that many miles. I think not. But I wanted to hear what you guys had to say. Thanks for the feedback.
My mother's town car 4.6 was 'burning' a quart every 1000 miles. It was the PVC valve & collapsed tubing to the throttle body sucking oil vapors and burning them. Check the pcv hoses on the throttle body..may be full of gunk...caused by pcv valve. Use seafoam to clean out the throttle body. Her oil use is now normal. she has about 130,000 miles. She was showing some oil smoke at idle after warmed up. That went away after replacement parts. $300 fix I think. Parts are stupid priced. I have a 2002 F150 5.4 with 120,000 and put NO oil in between 5,000 mile oil changes. My 2000 GT with 30k never loses anything on the stick. Make sure the mechanics are filling the oil filter with oil before installing the filter..that'll lose half a quart on the stick.
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Old 11-23-2010, 06:21 PM   #19
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Smile Re: 4.6 2002 burning oil.

I'm going to check it out as soon as tomorrow. That's really useful info. I think my pcv valve is not working because I noticed oil seep out and over the valve cover. I guess due to pressure not getting through the right way. I hope that's the problem.

thanks again.
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Old 11-25-2010, 05:12 PM   #20
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Re: 4.6 2002 burning oil.

Yo! I have a 02 gt with 80k. what was happening with mine was the hose that attach to the PCV was blowing oil from around the hose .. This is all factory . so I put a clamp where the hose meets the PCV in the valve cover no more oil usage . It fix ed the problem .. I don't know if you ever heard of Identifix but my buddies has it man . that things a life saver .
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Old 11-25-2010, 05:15 PM   #21
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Re: 4.6 2002 burning oil.

Yo! I have a 02 gt with 80k. what was happening with mine was the hose that attach to the PCV was blowing oil from around the hose .. so I put a clamp where the hose meets the PCV in the valve cover no more oil usage . It fix ed the problem .. I don't know if you ever heard of Identifix but my buddies has it man . that things a life saver .
peace
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Old 11-25-2010, 06:39 PM   #22
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Thumbs up Re: 4.6 2002 burning oil.

I thought it was the hose or around where the PCV valve sits.

Thanks for the 411.
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Old 11-27-2010, 01:02 PM   #23
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Re: 4.6 2002 burning oil.

tonyjuan you can start your car up and go look at your tailpipes to see if any water drips out of it. If so this means you are leaking at the heads water is in there your not burning oil. Soumds to me your not at this point. You might be about to burn up the heads instead with water cause I had this problem before with my 94 v6. So start it up go look at it give it few minutes to let it run and if you see water run or drip from your tailpipes. OH boy your going to pay dearly for this one. It can cost between 500-1500 bucks to bring to a mechanic unless you know people to help you out.
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Old 11-27-2010, 05:31 PM   #24
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Re: 4.6 2002 burning oil.

I'll check it out. Thanks for the info.
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