Sounda like a good way to blow out engine seals,not worth it at all.
Running A Quart Over
- Thread starter Merkava_4
- Start date
- Status
Explain to me how volume would increase pressure.....
With a PROPERLY working PCV, it'll never happen..
I run 15W40 HDEO in all my vehicles, so I'm often filling via 1-gallon jugs, 2 1/2 gallon jugs, or 5-gallon buckets depending on what I have in the stash or left-over. My fondness of BIG JUGS results in the occasional accidental over-full condition. If it's 1/4" or so, then I just don't care. That said, I wouldn't over-fill and engine on purpose... the potential benefits are minimal, while the potential consequences are catastrophic. Auto-cross fantasys aside... any benefits to this silliness could be just as easily (and more safely) realized with a slightly shorter OCI.
In all my years of wrenching, I can't say that I've ever seen an engine fail due to an over-full condition. However, I have TWICE run into a low oil pressure condition resulting from an over-fill... which would've EVENTUALLY lead to engine failure. Both cases involved bigass Cummins engines (an 855 and an N14). In both cases, the engines had been filled about two gallons over the full mark. These engines both have a sump capacity (including filters) of 42 quarts... so they were both about 19% over full. Percentagewise, that's less of an over-fill than Merkava's experiment.
In all my years of wrenching, I can't say that I've ever seen an engine fail due to an over-full condition. However, I have TWICE run into a low oil pressure condition resulting from an over-fill... which would've EVENTUALLY lead to engine failure. Both cases involved bigass Cummins engines (an 855 and an N14). In both cases, the engines had been filled about two gallons over the full mark. These engines both have a sump capacity (including filters) of 42 quarts... so they were both about 19% over full. Percentagewise, that's less of an over-fill than Merkava's experiment.
I still have the extra quart in there that I had when I started this thread. The engine runs very smooth and there are no bubbles on the dipstick after shut down. I like being able to wipe the dipstick off after checking the level without having to worry about being below full. I may go to the PF-52 filter on my next OCI.
Triple_Se7en
$50 Site Donor 2024
Ever try a new set of shocks or struts instead?
lol ebaker!
HOw much lateral-G can you run on your Maxima to "induce" oil starvation?? 3G??
* shaking my head in dismay...*
HOw much lateral-G can you run on your Maxima to "induce" oil starvation?? 3G??
* shaking my head in dismay...*
Well, in that case, it's the engine manufacturer/engine designer's fault then.
*to my understanding, this still doesn't constitute to waaay overfilling your crankcase in hopes (let's pray and pray reeeal hard) of not encountering a long enough ramp that will cut off your oil pressure*
On my 1995 Ford Ranger with the 4.0L V-6, the manual says that with an oil and filter change, capacity is 5 quarts. Yet, after an oil change when I put in 5 quarts, I'd be about 1/4" over full on the dipstick, and I'd get some oil weeping from the dipstick tube (at the block, not at the top!) and the rear main seal.
Yet, if I added only 4.5 quarts after the oil/filter change, I'd be right at full on the dipstick and I wouldn't weep any oil from the rear main seal or the dipstick tube. On this engine, there would be NO WAY I could run a quart over, it would just ooze it all out. I should note that this truck has nearly 120k miles on it...
If you wanted to add oil capacity, I'd add an engine oil cooler and/or an over-sized oil filter. I actually looked at the over-sized filter option for my Ranger, as I agree that extra oil capacity is a good thing. Problem with the Ranger is that the over-sized filter would hang down far enough I worried about road debris punching a hole in it...
later,
b
Yet, if I added only 4.5 quarts after the oil/filter change, I'd be right at full on the dipstick and I wouldn't weep any oil from the rear main seal or the dipstick tube. On this engine, there would be NO WAY I could run a quart over, it would just ooze it all out. I should note that this truck has nearly 120k miles on it...
If you wanted to add oil capacity, I'd add an engine oil cooler and/or an over-sized oil filter. I actually looked at the over-sized filter option for my Ranger, as I agree that extra oil capacity is a good thing. Problem with the Ranger is that the over-sized filter would hang down far enough I worried about road debris punching a hole in it...
later,
b
That doesn't seem right for you to be having a positive crankcase pressure like that; it seems as though the engine (should be) the same pressure as the outside world, which would be atmospheric. A more common term is "vented to the outside." I had always thought that part of the job of the PCV system was to keep the engine vented.
Quote:
On my 1995 Ford Ranger with the 4.0L V-6, the manual says that with an oil and filter change, capacity is 5 quarts. Yet, after an oil change when I put in 5 quarts, I'd be about 1/4" over full on the dipstick, and I'd get some oil weeping from the dipstick tube (at the block, not at the top!) and the rear main seal.
Yet, if I added only 4.5 quarts after the oil/filter change, I'd be right at full on the dipstick and I wouldn't weep any oil from the rear main seal or the dipstick tube. On this engine, there would be NO WAY I could run a quart over, it would just ooze it all out. I should note that this truck has nearly 120k miles on it...
If you wanted to add oil capacity, I'd add an engine oil cooler and/or an over-sized oil filter. I actually looked at the over-sized filter option for my Ranger, as I agree that extra oil capacity is a good thing. Problem with the Ranger is that the over-sized filter would hang down far enough I worried about road debris punching a hole in it...
later,
b
Are you sure the PCV system is functioning properly?
I ALWAYS RUN AT LEAST 10 QUARTS IN EVERYTHING.
Quote:
On my 1995 Ford Ranger with the 4.0L V-6, the manual says that with an oil and filter change, capacity is 5 quarts. Yet, after an oil change when I put in 5 quarts, I'd be about 1/4" over full on the dipstick, and I'd get some oil weeping from the dipstick tube (at the block, not at the top!) and the rear main seal.
Yet, if I added only 4.5 quarts after the oil/filter change, I'd be right at full on the dipstick and I wouldn't weep any oil from the rear main seal or the dipstick tube. On this engine, there would be NO WAY I could run a quart over, it would just ooze it all out. I should note that this truck has nearly 120k miles on it...
If you wanted to add oil capacity, I'd add an engine oil cooler and/or an over-sized oil filter. I actually looked at the over-sized filter option for my Ranger, as I agree that extra oil capacity is a good thing. Problem with the Ranger is that the over-sized filter would hang down far enough I worried about road debris punching a hole in it...
later,
b
My 99 4.0 also says full at 4.5 quarts. That's what I have been putting in, but will try 5 next time.
The rear main seals on these trucks are known to leak/weep. Mine started doing it last year. A couple of runs with ARX seems to have stopped it.
I'm running the huge Eao 26 on mine and there is no worries with obstacles as the suspension knuckles are lower. I do believe the 95 used a different suspension though.
Yeah you could run 6 quarts in there easy.
Does Motorcraft make an oversize filter for it?
An exercise of the "more is better" mindset.
I wish I had a 5 gallon sump.
And this is based on what?
Doing such experiments on your own car is one thing, but telling others to do it? Hmm...
- Status
