60K observation 4.0L

Original sparkplugs replaced with factory densos. Took some photos with my bore scope in each cylinder. Mind you I don’t have a oil catch can...maybe it’s time, lol. The original sparkplugs were .050. Gas mileage has been 20-23. Regular octane.

 

Dump a can of Seafoam into a full tank of gas at every oil change, it'll keep that carbon build-up at bay...

 

Will do. I do run Redline SL1 a few times.

 

I have never used seafoam, but I think I should. does no harm, only good I think right?

edit...answered my own question

https://seafoamsales.com/auto/

 

Redline SL1 is good from what I hear, never tried it though. Used to use BG 44K, but don't have it as readily available compared to Seafoam. Amazon is always an option, but it's overpriced on there.

Any of the fuel additives/treatments/cleaners can cause problems if abused, but one dose every 3-5k in a full tank will do no harm.

 

just passed though 100K, i want to make sure I do what i can to extend my life and reduce deposits / gunk

 

Well, you're on the right track in my professional opinion.

"Ounce of prevention, pound of cure"

 

thanks. I am definitely a fan of preventative maintenance. oil every 5K. plugs every 30K. diffs / t-case every 30K. did tranny / brake fluid / power steering fluid at 100K. drain / fill radiator ever 30k.

 

I just did mine @ 60k as well this past weekend and they were all gapped at around .50 just like yours.

 

Might want to up your brake fluid flush from 100k to every 30k (or every other year basically). Being hygroscopic, its boiling point drops the more moisture it absorbs and the acidity of it goes up, degrading the condition of the rubber hoses and seals in the system.

Derp - just realized you just hit 100k and did the brake fluid. *facepalm* Carry on, nothing to see here...

 

The densos wore less than the ngk...not much which I thought was interesting.

 

Best.

 

Same here .

 

Seafoam is good schidt........

keep a can or two in your garage..........

 

Really? Would you recommend with 118k miles, probably never done before...

 

Yes.

 

Are you a mechanic? Seriously, not trying to be smartazz.

 

Yup, going on 25 years professionally. Grew up in a motorsports family running around the local drag strip and asphalt oval. ASE master for ~20 years now, L1, X1, GM factory certified, etc.

I now work on a hotline for Alldata. When your mechanic can't figure it out, I'm one of those guys he calls for help. lol

 

I’ve seen a bunch of videos of guys using sea foam to clean carbon deposits and it did very limited cleaning. Like, not worth using it limited.

 

Wow, cool. I had a feeling. You spoke with automotive authority. So the Seafoam every 5k or so instead of the cheaper fuel treatment stuff you'd say?..