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Oils keeping engine clean-Difference? #5433145 05/19/20 09:43 AM
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BTLew81 Offline OP
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I’ve been going back and forth on whether or not to stay with Castrol Edge/EP in my accord 2.0t. I’m not sure there is really any reason to move, as I believe edge/EP are on par with Mobil 1 and others that are seen as top tier.

In fact, I’ve even thought about using something cheaper like ST or Kirkland, as I’m only going 4-5k OCI due to this being a TGDI engine.

My main concern is long term engine cleanliness, as I will have this car for a good long time. Is there really a tangible difference in engine cleanliness between oils, knowing this engine has 20k on it and doesn’t really require cleaning? On that same note, do we have current oils that leave engines dirtier?

I’m GUESSING that maybe Mobil, Castrol, etc might be a bit better than the cheaper lines, but was hoping the experts could chime in.

Thanks.


2018 Honda Accord Sport 2.0T/10 Speed
Modern Steel Metallic/Black
Factory Fill/Filter
Re: Oils keeping engine clean-Difference? [Re: BTLew81] #5433158 05/19/20 09:52 AM
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Why is cleanliness an issue? Any of todays top oils will allow your engine to out last your ownership of the vehicle with reasonable maintenance.


2015 F150 2.7
2018 F350 6.2
Re: Oils keeping engine clean-Difference? [Re: BTLew81] #5433159 05/19/20 09:53 AM
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Being a DI engine, there has been some chatter on here about the new Valvoline Modern Engine keeping the intake valves cleaner. Valvoline makes some pretty bold statements about it (40% cleaner intake valves), but I think that it is too soon for any hard evidence yet. May be worth looking into though.


13 Toyota Corolla S 1.8; Valvoline FS HM 0W20, OEM filter
12 Ford Fusion 2.5; Castrol EDGE 5W30, CQ Blue 85348
06 Toyota Tacoma 2.7; M1 HM 5W30, Wix XP
04 Ford Explorer 4.0; MC SB 5W30, MC FL820-S
Re: Oils keeping engine clean-Difference? [Re: BTLew81] #5433161 05/19/20 09:54 AM
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ABN_CBT_ENGR Offline
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Originally Posted by BTLew81
I’ve been going back and forth on whether or not to stay with Castrol Edge/EP in my accord 2.0t. I’m not sure there is really any reason to move, as I believe edge/EP are on par with Mobil 1 and others that are seen as top tier.

In fact, I’ve even thought about using something cheaper like ST or Kirkland, as I’m only going 4-5k OCI due to this being a TGDI engine.

My main concern is long term engine cleanliness, as I will have this car for a good long time. Is there really a tangible difference in engine cleanliness between oils, knowing this engine has 20k on it and doesn’t really require cleaning? On that same note, do we have current oils that leave engines dirtier?

I’m GUESSING that maybe Mobil, Castrol, etc might be a bit better than the cheaper lines, but was hoping the experts could chime in.

Thanks.


Engine cleanliness has less to do with the actual oil as it does with the PM frequency, mechanical condition and working environment.

Re: Oils keeping engine clean-Difference? [Re: AJB0009] #5433163 05/19/20 09:56 AM
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Originally Posted by AJB0009
Being a DI engine, there has been some chatter on here about the new Valvoline Modern Engine keeping the intake valves cleaner..
Lets call it regurgitating advertising claims


2015 F150 2.7
2018 F350 6.2
Re: Oils keeping engine clean-Difference? [Re: BTLew81] #5433197 05/19/20 10:35 AM
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If your valve seals and rings are functioning, the oil is not contacting the intake valves. How is it supposed to keep them clean?


If you want the job done right......do it yourself.
Re: Oils keeping engine clean-Difference? [Re: Snagglefoot] #5433198 05/19/20 10:38 AM
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Originally Posted by Snagglefoot
If your valve seals and rings are functioning, the oil is not contacting the intake valves. How is it supposed to keep them clean?
Oil mist and combustion by products via the pcv system as well as dirt bypassing or being too fine for the air filter. I am not sure about the oil cleaning the intake valves though.


2015 F150 2.7
2018 F350 6.2
Re: Oils keeping engine clean-Difference? [Re: ABN_CBT_ENGR] #5433416 05/19/20 02:49 PM
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IndyFan Offline
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Originally Posted by ABN_CBT_ENGR
Originally Posted by BTLew81
I’ve been going back and forth on whether or not to stay with Castrol Edge/EP in my accord 2.0t. I’m not sure there is really any reason to move, as I believe edge/EP are on par with Mobil 1 and others that are seen as top tier.

In fact, I’ve even thought about using something cheaper like ST or Kirkland, as I’m only going 4-5k OCI due to this being a TGDI engine.

My main concern is long term engine cleanliness, as I will have this car for a good long time. Is there really a tangible difference in engine cleanliness between oils, knowing this engine has 20k on it and doesn’t really require cleaning? On that same note, do we have current oils that leave engines dirtier?

I’m GUESSING that maybe Mobil, Castrol, etc might be a bit better than the cheaper lines, but was hoping the experts could chime in.

Thanks.


Engine cleanliness has less to do with the actual oil as it does with the PM frequency, mechanical condition and working environment.


I'd agree if we were talking about just sludge, but I've seen a clear difference in oils in engines well maintained. Heck, there have been some pics of engines run on Red LIne that have been incredibly clean, especially with less varnish, than typical for the mileage. I've also seen a number of valve trains run for hundreds of thousands of miles on M1 oils and they were among the cleanest I've ever seen. That's not saying the others were gunked up, but they certainly had at least more varnish.

That said, varnish really doesn't bother me unless it builds up. I haven't seen that too often.

I did have a 4 Runner with a 3.4 sludge-o-matic that was recalled. Mine ran exclusively on Mobil 1 5w30. When the dealership checked it they said it was perfect. Not a bit of sludge to be found and little varnish. My Dad wound up with it and sold it with over 200k on it. The valve train looked amazing. Those 3.4s were notorious for terrible sludging. We ran 4.5k to 7k OCI's with it, IIRC.

My 2004 Jeep Grand Cherokee had run up to about 104k on conventional bulk oil and the inside of the cylinders looked very gunked up. We've been running Pennzoil Ultra Platinum 5w30 in it for the last 3k and will swap it out for another run of the same in another 1.5 to 2k. I'm betting that the PUP cleans things up nicely. I'll be shocked if it doesn't.

In short, I've seen enough to firmly believe that there is a difference in cleaning ability between premium synthetic oils and others. Even if small, they are still noticeable to the eye.


18 Jeep JLUR Wrangler 3.6 31k
15 Ford Transit 129k, Reman 3.5 @85k
17 Jeep Renegade 2.4 29k
08 Jeep Wrangler 3.8 141k
04 Jeep Grand Cherokee 4.7 111k
99 Mercedes E430 Sport 90k
Re: Oils keeping engine clean-Difference? [Re: IndyFan] #5433635 05/19/20 07:29 PM
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Originally Posted by IndyFan


I did have a 4 Runner with a 3.4 sludge-o-matic that was recalled. Mine ran exclusively on Mobil 1 5w30. When the dealership checked it they said it was perfect. Not a bit of sludge to be found and little varnish. My Dad wound up with it and sold it with over 200k on it. The valve train looked amazing. Those 3.4s were notorious for terrible sludging. We ran 4.5k to 7k OCI's with it, IIRC.


Who says that? Those 3.4s are known to be bulletproof with even the most basic oil. The engine is extremely easy on oil. Might be a little varnish, but I've never heard of sludge unless it's been severely neglected.

Re: Oils keeping engine clean-Difference? [Re: nobb] #5433738 05/19/20 09:52 PM
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That's what I thought. I bought my 4Runner with 245k miles and didn't know much about previous maintenate. When I replaced the valve cover gaskets at 253k miles I was pleased to see some varnish but absolutely no sludge despite the PCV completely blocked.


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
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