1FZFE spark plug reading (3 Viewers)

[calokie]

Hello All
Anyone know what my spark plugs are trying to tell me? I’ve had 2 different opinions from to knowledgeable sources. One says to hot and the other says cheap gas

Removed from 1FZFE after purchasing from original owner. I didn’t see any tune up service records on Toyota database. I seen oil change etc but the service records start around 200x truck currently has 348k

 

[deltapine1]

Gas that is a few weeks old these days is suspect. I buy Non Ethanol 91 Octane and drive it daily. I do not think mine is gas related.

I am curious if yours had the White crystalline snow flake deposits?

 

[calokie]

Gas that is a few weeks old these days is suspect. I buy Non Ethanol 91 Octane and drive it daily. I do not think mine is gas related.

I am curious if yours had the White crystalline snow flake deposits?

Yes mine had the cystaline for sure, they were very evenly coated between cylinder positions. Truck ran pretty good when I pulled the plugs. I should have took some high power magnification images, they have been sitting outside thru a few rain storms I might try and get some nice images on a high power scope just for fun.

I am still a little concerned of the possibility of running too lean, my 80 exhauts smells strange to me, its strong but smells different not like most older cars I have had

 

[SpenserAK]

Bump for relevant thread & bored at work. I’m familiar with plug charts so I’m guessing slightly lean and/or hot.

2 years & 20k on them. Factory denso, correct gap, new OEM fuel filter, no codes, healthy idle, etc. Truck runs great, probably burns a little oil being at 230k, just throwing it out there for no real reason. All plugs are consistent. Not sure on cheap gas, probably all the same around here.

 

[BILT4ME]

Bump for relevant thread & bored at work. I’m familiar with plug charts so I’m guessing slightly lean and/or hot.

2 years & 20k on them. Factory denso, correct gap, new OEM fuel filter, no codes, healthy idle, etc. Truck runs great, probably burns a little oil being at 230k, just throwing it out there for no real reason. All plugs are consistent. Not sure on cheap gas, probably all the same around here.

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Burning clean, slightly lean, but that could be based on how it is driven.

 

[SpenserAK]

Thanks. Daily driven, and I’m pretty gentle on the skinny pedal.. not worried at all, just curious since I checked them recently.

 

[jpoole]

Just quickly glanced through the responses and didn't see much mention of oil burning/consumption (sorry if I missed it) but that's my take on what's causing the fluffy white buildup on the early plug pictures.