High Oil Consumption

ANGREY · Nov 16, 2017

jvandy50 said:
don't you guys think we'd notice puddles of oil underneath the car?

Absolutely.

For one, most GT350 owners aren't parking their cars in a dirt driveway. But more important than the sophistication of the drive way is the amounts we're talking. A drop of oil shows up on most concrete/pavers like a sore thumb. A quart would be impossible to miss. Even if some/most of the oil were being leaked out at work or somewhere other than home, the amounts we're talking about here, I have a hard time believing it's all leaking out and people just aren't noticing.

Plus everyone would be noticing the oil all over the car/engine/undercarriage. You can't leak that much oil without it coming up from the air foil at the back and rolling onto the back fascia, the back windshield, etc, etc. If it were leaks, the engines and undercarriage and frame/suspension would be FILTHY. So much so that any oil change shop (or the owner for DIYers) would notice it for each oil change.

PonyGlued · Nov 19, 2017

Take the car in and have them do a vacuum analyses test on her, that’s only if that test is still being done now a days, It can isolate a mechanical problem valve seats, rings etc. ...that’s too much oil, my hunch is that the oil is going out the tail pipes on a few of these oil problem motors, in fact I’m thinking some of these motors were over heated at some point in their young lives to the tune of 280f and above, which is catastrophic for some components

PonyGlued · Nov 21, 2017

Also if this motor did ever over heat that could be the reason

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Race Red Boss · Nov 21, 2017

PonyGlued said:
Also if this motor did ever over heat that could be the reason

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But I thought these motors were protected by the ECU.......sending the car into limp mode to avoid overheating? A quick scan of the ECU codes by the Ford Tech would reveal overheat conditions I believe as well.

ANGREY · Nov 21, 2017

I'm NOT saying it's definitive, just an idea here.....

So here are all the relevant facts and assumptions and one possible explanation:

1) It's pretty safe to assume that all the various GT350 owners are not just flat out wrong. It's probably a safe assumption that some engines are truly consuming excessive amounts of oil, while others are not. This is reflected both in the fact that many 350 owners are advanced car owners (who've owned/own many vehicles and aren't newbies) and also reports that Ford has indeed replaced several long blocks due to documented oil consumption. Summary, there are some people eating oil and others who aren't and all levels in between and it seems like that is well documented.

2) Ford has a long history of production knowledge and experience, as well as countless thousands of hours of development testing and experience. I find it highly unlikely that Ford didn't know about this issue prior to full production. It's also highly unlikely that this spectrum in oil consumption is a result in manufacturing variances or excessive tolerances or fitments. Again, this is a longstanding company with millions of engines developed, tested and produced and sold throughout the decades.

3) Given that one of the first recommended modifications to new 350 owners is an oil catch can, it's HIGHLY likely that oil carryover into the intake explains a great deal of the oil consumption.

4) For reasons stated above, it's unlikely the oil consumption can be explained through leaks. The amount of oil to account for is much too large to go unnoticed via leakage, both on the vehicle and in its various resting places. It ain't leaks.

5) The amount of oil being reported collected in the separators varies significantly. The only consistency reported is that most people feature either none or very little collected on the driver's side separator and most or all is collected in the passenger separator.

6) The amount of oil collected and oil carryover is related to driving style/use between oil changes and/or separator examinations. Obviously the "windage" or the amount of throw off the rotating components is higher with higher rpms and harder driving. There are probably other factors involved with bypass pressures as well.

The varying amounts of oil collected dependent upon different driving habits/use levels might serve to explain at least some, if not most or all of the oil consumption variances and is a much easier explanation than Ford simply messing up the cylinder honing or the rings allowing excessive oil by, etc. It also falls in line with some people showing photos of small amounts of oil and others showing quite high oil collection in very short amounts of time/driving/use.

PonyGlued · Nov 21, 2017

@Race

Race Red Boss said:
But I thought these motors were protected by the ECU.......sending the car into limp mode to avoid overheating? A quick scan of the ECU codes by the Ford Tech would reveal overheat conditions I believe as well.

Yes you are right and I was just grabbing at straws... in marine engines this fail safe always works, so I have to believe Fords system is prob not at fault

PonyGlued · Nov 21, 2017

ANGREY said:
I'm NOT saying it's definitive, just an idea here.....

So here are all the relevant facts and assumptions and one possible explanation:

1) It's pretty safe to assume that all the various GT350 owners are not just flat out wrong. It's probably a safe assumption that some engines are truly consuming excessive amounts of oil, while others are not. This is reflected both in the fact that many 350 owners are advanced car owners (who've owned/own many vehicles and aren't newbies) and also reports that Ford has indeed replaced several long blocks due to documented oil consumption. Summary, there are some people eating oil and others who aren't and all levels in between and it seems like that is well documented.

2) Ford has a long history of production knowledge and experience, as well as countless thousands of hours of development testing and experience. I find it highly unlikely that Ford didn't know about this issue prior to full production. It's also highly unlikely that this spectrum in oil consumption is a result in manufacturing variances or excessive tolerances or fitments. Again, this is a longstanding company with millions of engines developed, tested and produced and sold throughout the decades.

3) Given that one of the first recommended modifications to new 350 owners is an oil catch can, it's HIGHLY likely that oil carryover into the intake explains a great deal of the oil consumption.

4) For reasons stated above, it's unlikely the oil consumption can be explained through leaks. The amount of oil to account for is much too large to go unnoticed via leakage, both on the vehicle and in its various resting places. It ain't leaks.

5) The amount of oil being reported collected in the separators varies significantly. The only consistency reported is that most people feature either none or very little collected on the driver's side separator and most or all is collected in the passenger separator.

6) The amount of oil collected and oil carryover is related to driving style/use between oil changes and/or separator examinations. Obviously the "windage" or the amount of throw off the rotating components is higher with higher rpms and harder driving. There are probably other factors involved with bypass pressures as well.

The varying amounts of oil collected dependent upon different driving habits/use levels might serve to explain at least some, if not most or all of the oil consumption variances and is a much easier explanation than Ford simply messing up the cylinder honing or the rings allowing excessive oil by, etc. It also falls in line with some people showing photos of small amounts of oil and others showing quite high oil collection in very short amounts of time/driving/use.

Yes I always felt the oil probably going out the exhaust because no puddles

PonyGlued · Nov 22, 2017

well everyone has an opinion of what was going on. Mine is that the cars were allowed to over heat...it’s kinda crazy but there are guys on here who think modern engines can be run @ 300f just because they are modern and a law of physic’s was defeated

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N9TMARE · Nov 23, 2017

Gt350s having a lot of engine problems lately
Couple blown engine sitting on my dealer warehouse

PonyGlued · Nov 23, 2017

that stinks, that’s 3 then that I have heard,

I’m thinking of just sticking with my 12

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PonyGlued · Nov 23, 2017

I guess I will look for another this year and forget about the 350, I would be to scared of buying a damage one with no visible signs

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Osiris · Dec 17, 2017

This is how much oil was left in my CC after 5k miles, just before it's oil change. The cup there is a 6 oz foam cup, so I assume that's about 1 fl.oz or less after an 1800 mile cross country road trip and 16 laps around an autocross course as well as normal city and highway driving. I didn't take a pic of the dipstick at the time but it was at the full level from what I could tell. It was hard to see since the oil was pretty clear on it.

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wvmystichrome · Apr 12, 2018

Hey guys how many got their engine replaced by Ford. A former Ford Master Tech friend of mine has a friend who has had the oil loss in his car happen. He was unaware. Well his engine blew up and it only had 16,000 miles on it factory stock. They told him tough luck. Said he was supposed to watch the oil level. Now he has a car he is still paying for with no motor. What has others done besides going through their usage tests to get their long blocks replaced? Thanks.

jvandy50 · Apr 12, 2018

Curious when his last oil change was before it went

Osiris · Apr 12, 2018

Any manual will tell you to check the oil periodically...Owners have a responsibility to their vehicles as well.

What you need to watch out for as well are the people who service it. I took my car in for the second oil change and they only put in 8 quarts. I was pretty upset to say the least.

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biminiLX · Apr 12, 2018

Oil level warning light?
-J

Osiris · Apr 12, 2018

biminiLX said:
Oil level warning light?
-J

Never got that far. I checked it right away when I saw the invoice and walked back in the store to question it. The advisor got more pissed off than I did

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IamRacerX · Apr 13, 2018

Just read Car and Drivers long term tester GT350 has burned through 5 quarts in 3k miles..... Ford told them up to 1 quart every 500 Miles is normal in the Voodoo!!!!!!! WTH?...

Osiris · Apr 13, 2018

IamRacerX said:
Just read Car and Drivers long term tester GT350 has burned through 5 quarts in 3k miles..... Ford told them up to 1 quart every 500 Miles is normal in the Voodoo!!!!!!! WTH?...

Up to that under track conditions. Its a high revving V8 afterall...

I have already shown how little mine has used in 5k miles under normal driving

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662 · Apr 13, 2018

wvmystichrome said:
a friend who has had the oil loss in his car happen. He was unaware. Well his engine blew up and it only had 16,000 miles

Sounds fishy.

I think the oil issues are:

- hose compression fittings on the oil cooler block by the oil filter that leaks under pressure and

- improperly torqued oil filter blow-by

Ford has a tsb for the hoses and sent everyone a oil filter wrench to try and make all aware and address these issues.

My opinion is either of these can appear to be a steady loss or either can suddenly get worse, maybe a improper torque on the filter or hose oring suddenly fails and if the oil issue suddenly got worse then one could unknowingly "develop" the issue quickly, but the light and oil pressure would have been signaling when the levels drop before failure, and they would have. There also would have been a lot of oil on the belly pan and oil filter area. The possibility exists for catastrophic failure.

So, I bet there are cars that have or will have oil issues and possibly engine issues because of them. I owned a hose leak car and had to diagnose the issue for my dealer after giving them 3 attempts. I suspect many dealers mis-diagnosed the hose leak for the loose filter issue like mine as well... Other than these known and very preventable issues, I am skeptical about burning oil issues.

Clearly our cars have oil concerns and owners will need to pay attention.
-notorious

High Oil Consumption

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