8 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHSpark plugs reading
Leading reported evidence
Use shell 91 octane
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
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0
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1
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Leading evidence: 'Use shell 91 octane' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Clean zone"' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion · Original poster
I do not push the car enough so the plugs dont enter in what I can call the "self cleaning zone".
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Suggestion · Original poster
I guess a good highway run at 5500 and more for a couple minutes will change the look!
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
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8 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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Generation: 20261026T120458Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi
I just did my spark plugs change and I would like ask more experienced owners here.
I know you guys have a lot of experience and Im not used to read spark plugs on a 4 cycles engine.
What do you guys think?
The plugs have 20000kms on them.
Im wondering what can cause the ash deposits and if I should do something about it?
Is the engine consuming an excessive amount of oil? Usually ash comes from additives in oil and/or gasoline. If the engine has high mileage, possibly valve guides are worn??
The car consume a little bit of oil.
its not always the same sometimes I do have to top it off a little bit.
For example during 1000kms it wont take any oil but for another 1000kms it can take up to 400ml.
I verify the oil level once per 2 weeks.
I did top off the level for 400ml before doing another 500kms and no oil was burned.
The car sat for few months in storage and the level was the same when I took it out.
I never add additive to fuel or oil except for Sta-Bil in gas for winter storage.
As for fuel I use Shell 91 octane.
Hi
Ive ask some question around it seems that theses residues are perfectly nornal for a week-end car not pushed over 5500rpms...
I do not push the car enough so the plugs dont enter in what I can call the "self cleaning zone".
Ill try some good runs before changing the pkugs next time and will see if the deposits are cleaned.
I guess a good highway run at 5500 and more for a couple minutes will change the look!
As always yes! I drive the car for a minimum of 30 mins when I use it.
I start the engine, put my seat belt and drive under 3000rpms until the engine is at operating temp for 5-10 mins.
When I store nice cars,, I fill them with alcohol free fuel and add the stabil, when its time to drive it,
I unhook the fuel line andd a hose and jumper the pump relay and drain the fuel in to my daily..
The less air in the fuel tank the better, oxygen reacts with the fuel blends and ages the fuel.
My GM mini suv will run on crap just fine..
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