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#939400 - 07/12/07 09:53 AM
Re: 80K miles on Motorcraft 5w20 blend
[Re: Mokanic]
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Registered: 11/15/02
Posts: 8706
Loc: SC
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I agree with this post. This doesn't bode well at all for those of you, including me, who who thought MC was this great oil that is *beyond reproach*. I used it for one OCI tho and it performed well but it looks like that may have been a misnomer and there may be a hidden price for atleast the application above if not across the board. Now, am I going to regret using it for one OCI? no, not at all. It's when you use it over and over for 5-7.5k OCIs, and apparently 3k and 3-5k( ) is when this will happen!
First off......oh brother. You're back. Yea. 
Did you NOT read the original thread????? We do NOT know the history of this engine for the first 32k miles! You CANNOT slam MC because of this unknown history! The F-150? A separate instance. You cannot make a broad statement that MC will do this in 3k miles!
Mods: Why would you let this B.S. return? It's starting all over again.
So you feel that if you disagree with a post it should be eliminated?? I simply gave the results of MC being run exclusively in a truck that it was designed to be in. I know it had not been run hard as many say the Mustang was and I know the service records were impeccable. Nowhere did I say I had proof that MC was an inferior oil but the results (varnish deposits) says volumes about the oil's ability to keep an engine clean especially at such conservative intervals. Based on what I have seen in that one truck's engine I don't think MC is anything more than a lowest-bidder oil. Does anyone here even know conclusively that it's always been made by one supplier?
I also know that by simply changing to another brand of oil the truck's long-time lifter noise stopped in less than 50 miles. Yeah, I know, the different oil didn't have anything to do with that .
We don't know what happened the first 32K of the Mustang's life but I do know what has taken place in the life of the F-150 and the results look the same. Is there a problem with 4.6L engines varnishing up? Does anyone have a TSB to that effect? If so I guess we can say definitely the oil was not at fault. There is however the very real possibility that not all oils are created equal and some are less efficient at keeping an engine clean. This could be an example.
All I did was to relate what I had seen first-hand and share the results of switching to another oil. If that is treason make the most of it. 
You do realize the post he quoted isn't yours, right?
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2012 Chrysler 300, 3.6, ZF 8-speed: QSUD 5w30
2008 Ford Taurus X: MaxLife 5w20; MaxLife ATF
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#939403 - 07/12/07 06:45 PM
Re: 80K miles on Motorcraft 5w20 blend
[Re: Greggy_D]
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Registered: 04/06/05
Posts: 671
Loc: Texas
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One last note... he bought the car in 2002 .... with 32k miles ... 1997 to 2002 .. five years, 32k miles supposedly on the OD.
(Zac I do not doubt your story whatsoever ... I am in doubt as to what the P. O. did with your car)
I do not understand how anyone could bash any oil based on the one picture posted given the 5 years of mystery about the motor.
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#939404 - 07/12/07 07:48 PM
Re: 80K miles on Motorcraft 5w20 blend
[Re: Zacharyx]
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Registered: 12/10/06
Posts: 253
Loc: Michigan
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So, how much of an improvment did the heads and bullit intake make?
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2005 Grand Prix GTP
2003 Expedition 5.4
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#939405 - 07/13/07 06:00 AM
Re: 80K miles on Motorcraft 5w20 blend
[Re: rat]
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Registered: 07/06/07
Posts: 1169
Loc: Canada
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MolaKule
Group IV Member
Reged: 06/06/02
Posts: 8687
Loc: Midwest Re: Additives - Detergent - Dispersants
#525636 - 12/20/04 02:55 PM Edit Reply Quote Quick Reply
All sludge is an aggregation of various hydrocarbons.
The dispersant and detergent have a useful life.
It is not so much they become geriatric as the fact they are used up surrounding and conglomerating sludge particles. I.E., they can only hold so much sludge in suspension.
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This is commonly known, but to back up the fact that over- extended oci would have caused the junk occurance in this engine. The miles YOU put on this engine may have had routine oil changes, but before this happened there were 5 years of abuse that no oil could cover.
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2009 Chevy Silverado 2500HD 6.6 LMM
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#939406 - 07/13/07 08:06 AM
Re: 80K miles on Motorcraft 5w20 blend
[Re: Zacharyx]
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Registered: 02/04/07
Posts: 2097
Loc: kansastan
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Sure, this engine isn't squeaky clean... but this is nothing out of the ordinary. We're talking about a 10 year old vehicle with an unknown history... in the sort of car that's commonly rode hard and put up wet. 8000 miles per year isn't that much, either- this car has likely done a fair amount of sitting and/or short trips. IMO, this post tells us nothing whatsoever about Motorcraft oil (which I've never used).
If this was my engine, I wouldn't lose any sleep over this. I'd probably switch to either a good synthetic, or (cheap ba$tard that I am) an HDEO like Rotella (my personal preference, anyways). HDEO's have to be chock full of dispersants to meet the new CI-4 spec (lotsa soot in diesels), and most also meet the SM spec.
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The invisible and the imaginary look exactly the same.
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#939407 - 07/13/07 08:50 AM
Re: 80K miles on Motorcraft 5w20 blend
[Re: Zacharyx]
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Registered: 03/21/06
Posts: 461
Loc: Fredericksburg, VA
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Zacharyx, best of luck and success in Iraq! Your GT will spring back to life despite the varnish when you return and take her for a spin. I have a '96 GT with three times the mileage of your car, and it runs like a champ.
The previous owners of my car used a 10W-30 conventional (Chevron) that gave considerably less varnish than you are realizing. I think the difference is that you must do more short trips on cold oil. Thus the fuel in the oil is significant and causes the bad varnishing.
All the fleet success stories with the MC oil seem to be for engines that see few cold starts. You should probably be using an oil with a potent detergency additive pack and more indestructible basestock to combat the fuel dilution. I have been using the Syntec 5W-20 at an OCI of 5000miles and the varnishing has been disappearing from the higher splash areas on the topside of the heads. One or more lifter remains sticky and noisy, so varnishing is a thing to be avoided in these engines.
Go with a highest quality synthetic 20 weight oil from here on out at 5K OCI (or longer as determined by UOA). The engine should last a long time before the next teardown.
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#939408 - 07/13/07 08:50 AM
Re: 80K miles on Motorcraft 5w20 blend
[Re: rat]
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Registered: 07/10/07
Posts: 48
Loc: Normally SAV GA but TQ Iraq fo...
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So, how much of an improvment did the heads and bullit intake make?
Its actually the intake the bullit was based off of that was made for the NPI heads. But the heads, intake and the 99+ cams added 67rwhp and 37rwtq. I haven't been able to drive it yet as I am still in Iraq but I get a two week break shortly. The guy who tuned it said it pull strong all the way to 6K and where with the old H/C/I it fell off at around 4800. The first time I will get to drive it will be on the way to Mustang Week
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#939409 - 07/13/07 09:02 AM
Re: 80K miles on Motorcraft 5w20 blend
[Re: Zacharyx]
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Registered: 03/21/06
Posts: 461
Loc: Fredericksburg, VA
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These 4.6L NPI engines definitely need some port work to raise and broaden the powerband. I hope you like your mods; I will be doing the same in the near term.
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#939410 - 07/13/07 05:19 PM
Re: 80K miles on Motorcraft 5w20 blend
[Re: Rodbuckler]
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Registered: 07/10/07
Posts: 48
Loc: Normally SAV GA but TQ Iraq fo...
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These 4.6L NPI engines definitely need some port work to raise and broaden the powerband. I hope you like your mods; I will be doing the same in the near term.
Depending on your goals, I would suggest just doing the PI intake and cams. If you want more power than that will give you find a cheap set of NPI heads and have Jason Steen work them since you are already in VA, and go with a better cam, I am sure you can cross 300rwhp with worked NPI heads, PI intake and a good set of cams. And you will still be at a blower friendly compression ratio
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#939411 - 07/14/07 12:14 AM
Re: 80K miles on Motorcraft 5w20 blend
[Re: Zacharyx]
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Registered: 01/11/07
Posts: 513
Loc: El Oeste
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Late to the party, but I'm right with Honda Man on this. I think it would be jumping the gun to dismiss lots of good to great UOAs (lots seemed to be posted last winter) of MC 5W-20 with one picture of an engine that has an unknown history for several years and 32K miles.
Remember the guy with the Crown Vic who posted erlier this year that he'd just turned 200K on his (cop?) car using MC 5W-20? I would put more stock in that than this picture of this car since the whole history of the CV was known.
Zach - stay safe over there. And thank you.
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#939412 - 07/14/07 12:31 AM
Re: 80K miles on Motorcraft 5w20 blend
[Re: HawkeyeScott]
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Registered: 02/15/07
Posts: 651
Loc: SF Bay Area
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What ignition wires are those black ones you are using? They look really thick compared to stock ones...
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Trust in Amsoil, Mobil 1, Redline, & PP products
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#939413 - 07/14/07 05:33 AM
Re: 80K miles on Motorcraft 5w20 blend
[Re: HondaMan]
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Registered: 01/20/03
Posts: 18449
Loc: East of IGO
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What does the varnish hurt? The motor must be in good enough shape to put the new heads etc on.
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Why do people post I want the best for my car,,, When there isn't anything that is the best on the car to begin with.
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