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#4813127 - 07/13/18 11:45 AM Skyactiv Intake Valve Deposits
buster Offline


Registered: 11/16/02
Posts: 30495
Loc: NJ
I may have started a thread on this before, but I can't locate it. Has anyone that has a Skyactiv engine, or know someone that does, had any intake valve deposits? It does not seem to be an issue with these engines.

I have a 2015 (2.0 MT) and have only used Mobil 1, which has a SA of .8 and a NOACK of 10%. I have not taken a look but the car runs like new with 53,000 miles on it.
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#4813130 - 07/13/18 11:53 AM Re: Skyactiv Intake Valve Deposits [Re: buster]
PimTac Online   content


Registered: 03/04/17
Posts: 4598
Loc: Soviet State of Washington
From everything I have heard or read, the Mazda SkyActiv engines seem to handle fuel dilution and deposits better than other GDI engines. I have no actual experience other than owning the car in my sig but the miles are pretty minimal at this point.
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#4813135 - 07/13/18 11:57 AM Re: Skyactiv Intake Valve Deposits [Re: buster]
buster Offline


Registered: 11/16/02
Posts: 30495
Loc: NJ
Thanks PimTac. That's what I've heard too.
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#4813161 - 07/13/18 12:40 PM Re: Skyactiv Intake Valve Deposits [Re: buster]
Eddie Online   sleepy


Registered: 12/07/03
Posts: 9649
Loc: Florida, Cape Coral
The three UOA on my CX5 2014 2.5 liter showed no fuel dilution over ~ 0.2%


Edited by Eddie (07/13/18 12:41 PM)
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#4813176 - 07/13/18 12:59 PM Re: Skyactiv Intake Valve Deposits [Re: buster]
Quattro Pete Offline


Registered: 10/30/02
Posts: 35962
Loc: Great Lakes
Originally Posted By: buster
I may have started a thread on this before, but I can't locate it.

Here you go:
https://www.bobistheoilguy.com/forums/ub...its#Post4719538

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#4813206 - 07/13/18 01:40 PM Re: Skyactiv Intake Valve Deposits [Re: buster]
buster Offline


Registered: 11/16/02
Posts: 30495
Loc: NJ
Thanks QP!
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#4813463 - 07/13/18 07:32 PM Re: Skyactiv Intake Valve Deposits [Re: buster]
E150GT Offline


Registered: 03/11/12
Posts: 1151
Loc: San Antonio, TX
So at 22k miles my car started pinging pretty bad. I took it in and they said the intake was full of oil and the valves were dirty. They recommended a valve cleaning. I made them do it under warranty. Made no difference. I switched to 93 octane Got almost 60k now.
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#4813472 - 07/13/18 07:45 PM Re: Skyactiv Intake Valve Deposits [Re: E150GT]
Patman Offline



Registered: 05/27/02
Posts: 20477
Loc: Oakville, Ontario
Originally Posted By: E150GT
So at 22k miles my car started pinging pretty bad. I took it in and they said the intake was full of oil and the valves were dirty. They recommended a valve cleaning. I made them do it under warranty. Made no difference. I switched to 93 octane Got almost 60k now.


That doesn't seem right to me, you shouldn't have to run 93 octane in order to avoid pinging when that car calls for 87 octane. Mazda should fix this properly for you.
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#4813526 - 07/13/18 09:10 PM Re: Skyactiv Intake Valve Deposits [Re: buster]
wemay Offline


Registered: 04/04/12
Posts: 8990
Loc: Southeast Florida
Mazda is one brand i haven't heard or read of any large scale GDi related issues.
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#4813747 - 07/14/18 08:24 AM Re: Skyactiv Intake Valve Deposits [Re: buster]
Patman Offline



Registered: 05/27/02
Posts: 20477
Loc: Oakville, Ontario
Since we found the duplicate thread, I'm going to close this one.

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