Barnhill

I have a new to me 2006 fx4 with a 5.4 that burns oil. (130,000 miles) It was my brothers old truck. After doing some research about it, I saw that in some cases a PCV (positive crankcase ventilation) valve that is closed or clogged can cause the engine to burn oil. (watched a video on youtube) When the truck is running you can't smell any old being burnt and I have not been able to find any oil under the truck. (it has rained every time I've been home.) The truck has a x pipe running straight out the back. I have noticed that there is some type of residue in side of my tips. I can't say that its oil but it might be. (a lot of soot) Does any one have any recommendations on what I should look at to figure out why its burning oil and also has any one had a problem with the PCV Valve or there 5.4 burning oil.


Thanks,

MHOWELL34

Its normal buddy. Up to a quart every 1000 is considered normal on a ford modular engine. Mine uses exactly that. My grandad has been a small engine mechanic all his life. He said the motors that use a little oil tend to run a hell of alot longer. It may be using a little of oil, but it's broke in and lubed up inside you can believe that lol. Just keep check on it. Drive 1000 miles and see how low it is. I have straights as well and hasn't gotten any better or worse I've tried almost every synthetic. Bout to go back to dyno oil


Also the pcv valve on a 3 valve is in the valve cover itself. I replaced it all when I did my cam phasers and it still uses oil. It's a heat controlled valve on a sensor. You can try but it prolly won't help its what's the engine is settled into.

Barnhill

I get what your saying. I have seen a lot of these 5.4 that have 200,000 miles to 300,000 miles that don't burn a drop. I was thinking about trying a thicker oil but i guess that wont work. Also for curiosity reasons I want to know what part has messed up. Also my brother said it burns about a quart every 1,000 miles. but do you get a lot of soot in your exhaust pipe?

MHOWELL34

Yeah it's there. I'm at 220k. I would just keep driving it and make sure it never gets worse. Just buy you 2 5 quart jugs each oil change. Keep the rest for when it gets low. 😁

tareed94

My 07 I think is starting to burn some oil. It was a quart low the other day with 170,000 miles on it, black soot on the exhaust tips etc. It's normal. I was curious about the soot as well and was told it was normal.

joe mcmillan

Don't go with a thicker oil in the 5.4 engine....
You will likely cause more issues from lack of lube.
Keep using a good quality oil of the recommended viscosity - refill as necessary.
Good oil is much cheaper than major repairs.

dom07

Replace the motor NOW! Impending doom! Danger, Will Robinson, DANGER!

I crack me up.

Check your oil regularly, and top it off. Some motors burn oil, there's nothing you can do about it now. At $4/qt, and burning a quart every 1K miles, you invest the whopping sum of $60 in oil to drive for a year.

I'd just buy the oil and move on down the road.

chicken07

buckshot 06

I have a 06 with 219,000 on it and burn a quart of oil every 1000-1200 miles. I use Royal purple. Now I'm not so worried that I see everybody else is burning oil too.

nrivera04