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Carbon deposits under valve cover - Ford 6.2L #5460797 06/23/20 02:06 PM
Joined: Jun 2020
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SnowSTi Offline OP
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I've read these forums for years, but have never posted anything until now.

I've got a 2015 Ford F-250 6.2L with 175,000km and a whole load of idle time on it (3000 hr). I've only owned it for about a year so it's previous maintenance history is a bit unknown. The truck is used for heavy towing and gets M1 5W30 Truck & Suv oil with a Fram XG2 filter regularly.

I noticed some light carbon build up under the oil cap when I was changing the oil. Do you think this is anything to be concerned about? I change the the oil when the oil life indicator reaches 30%, but the previous history of the truck is the big unknown. It doesn't look too bad to me, but figured it was worth asking the internet just in case.

[Linked Image]

Re: Carbon deposits under valve cover - Ford 6.2L [Re: SnowSTi] #5460803 06/23/20 02:12 PM
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buster Offline
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Hard to say from just one photo. The Mobil 1 should continue to help clean out the residual sludge/carbon that was left behind by a less expensive and inferior oil. It's also possible the prior owner didn't change the oil often enough which lead to oxidation. The prior owner, after spending thousands on the truck, probably wanted his little $3 rebate on his $14 jug of oil.

If you really wanted to clean it up, Valvoline makes an oil that would do the best job. Red Line would likely be right behind it.


2020 - Mazda CX-30 - Mobil 1 EP 0w20
2019 - Subaru Impreza - Dealer Oil
Re: Carbon deposits under valve cover - Ford 6.2L [Re: SnowSTi] #5460807 06/23/20 02:16 PM
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wemay Online Happy
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I think buster is alluding to Valvoline Premium Blue.


19 Passat Wolfsburg 2.0 TSi: Castrol 508 0W-20
13 Santa Fe Sport 2.0T: GTX Magnatec 5W-30
Re: Carbon deposits under valve cover - Ford 6.2L [Re: SnowSTi] #5460811 06/23/20 02:19 PM
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CT8 Online Content
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Nothing to worry about. It didn't stop you from buying it why now the concern?


2015 F150 2.7
2018 F350 6.2
Re: Carbon deposits under valve cover - Ford 6.2L [Re: CT8] #5460818 06/23/20 02:23 PM
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gathermewool Offline
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Originally Posted by CT8
Nothing to worry about. It didn't stop you from buying it whay now the concern?


+1 I'd call that a heavy varnish, which is nothing to worry about in that location.

From what I can see of the chain, it looks pretty chainy colored (no varnish), which is good.


14 Forester XT Touring FA20DIT (Cobb Stage 1)
Castrol Magnatec 5W-30 D1G2 + FU filter (2nd OFI) (77,760mi, 3/7/20)
15 Legacy Premium FB25
Magnatec 0W-20 D1G2+ FU filter (2nd OFI) (54,621mi, 3/4/20)
Re: Carbon deposits under valve cover - Ford 6.2L [Re: SnowSTi] #5460821 06/23/20 02:27 PM
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77Se7en Online Content
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Welcome to BITOG
I would be happy to see my engine look like that, at roughly 165k and no idea on past history or past maintenance. Your Mobil-1 Truck & SUV oil is built to withstand stress and heat, more-so than heavy cleaning.

Valvoline recommendation works, as does Pennzoil Ultra Platinum, which boasts itself thru marketing as a good cleaner. I buy mine at Walmart.com. Two jugs will get you free shipping. Do a couple 5K OCIs. That filter choice is a good one. You could do two OCIs with that Fram XG filter. Just leave it on the next oil change-time and a 10k run (two 5k OCIs) is only medium duty for it.

I usually loosen the used filter - drain it - then reinstall it. Before installation, give the gasket a wipe-down and re-oil it. I never had one leak.

Last edited by Triple_Se7en; 06/23/20 02:30 PM.

Spiritual Intuitive / Whisperer-Medium (Involuntary & Non-Profit)
Valvoline ME, Mobil-1 EP & Pennzoil Ultra Platinum 5w30s








Re: Carbon deposits under valve cover - Ford 6.2L [Re: SnowSTi] #5460825 06/23/20 02:29 PM
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PowerSurge Offline
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Doesn’t look bad to me considering all the idle time it’s had. Keep doing what you’re doing.


1993 Porsche 964, 2001 Ford SVT F-150 Lightning, 2004 Chevrolet Corvette, 2018 Toyota Tundra 5.7L
Re: Carbon deposits under valve cover - Ford 6.2L [Re: SnowSTi] #5460833 06/23/20 02:37 PM
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ford46guy Offline
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Those engines are great and run forever. I did research to buy an F150 Limited w/6.2, there was a guy who had 400K on it with hard commercial Texas use. They do break valve springs though, that is the only problem.
Very rarely they grenade the cylinder.

Last edited by ford46guy; 06/23/20 02:38 PM.

95 Tbird V8 240K PP SYNTH ULTRA 5W30
98 MGM 160K M1 HM 5W20
96 Explorer EB V6 159K PP SYNTH HM 5W30
95 Conti 155K MC 5W20
11 GS350 90K PP HM 5W30
Re: Carbon deposits under valve cover - Ford 6.2L [Re: SnowSTi] #5460844 06/23/20 02:45 PM
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ka9mnx Offline
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Looks fine. Most people wish their valve cover looked that bad.


2005 Ranger 3.0 - SuperTech Syn 0w-20/Motorcraft
2000 4Runner 3.4 - SuperTech Syn 5w-30/Toyota
1997 B2500 Van 3.9 - M1 HM 10w-30/Mopar
1993 F150 4.9 - SuperTech Syn 5w-30/Motorcraft
Re: Carbon deposits under valve cover - Ford 6.2L [Re: SnowSTi] #5460861 06/23/20 02:55 PM
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double vanos Offline
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welcome

Looks like the M1 is slowly cleaning things up! Carry on....


Sabine Schmitz is the Queen of the 'Ring; Svetlana Kapanina is the Queen of the SKIES...
Re: Carbon deposits under valve cover - Ford 6.2L [Re: SnowSTi] #5461320 06/24/20 08:53 AM
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LubricatusObsess Offline
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That varnish is probably baked on but good after all those kilometers. Definitely looks to be varnish, not sludge. Varnish is oxidized oil / additive plated out like an enamel paint. Sludge is typically from cold idling.

Varnish is cleaned only slowly and gradually. Pennzoil Ultra Platinum is one of the better oils ant prevention and cleaning. Many of us that switched to it noticed our first oil changes were visibly darker than subsequent oil changes, indicating cleaning action. Pennzoil also provided photos of engines after Sequence IIID testing showing visible cleanliness.

Welcome!

Re: Carbon deposits under valve cover - Ford 6.2L [Re: SnowSTi] #5461373 06/24/20 10:12 AM
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Go PUP..... Valvoline Modern Engine too. I'm guessing Mobil-1 EP right there with em'.


Spiritual Intuitive / Whisperer-Medium (Involuntary & Non-Profit)
Valvoline ME, Mobil-1 EP & Pennzoil Ultra Platinum 5w30s








Re: Carbon deposits under valve cover - Ford 6.2L [Re: SnowSTi] #5461383 06/24/20 10:31 AM
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BLND1 Offline
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Just run a name brand synthetic. It won’t matter which.

It’s a Mod Ford 6.2, it loves to rev, so hook it up to a trailer and use it for what it was meant to do (yank 10-15k pounds around at 4K RPM all day).

Re: Carbon deposits under valve cover - Ford 6.2L [Re: SnowSTi] #5461433 06/24/20 11:41 AM
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kstanf150 Online Content
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Welcome !!

Not many of us 6.2L Ford guys around here. I’m now using Redline 5W-30 in my truck which has solved my cold start tick.
Good luck with your truck !👍

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