spark plugs at 75000 miles.

[Left Coast Geek]

So after reading about high mileage spark plugs causing a decrease in mileage, and wondering why I wasn't seeing the sorts of gas mileage others report, I figured 75000 miles wasn't too soon to put in new plugs, just got 6 NGK Ruthenium HX installed.

These are the plugs that were pulled...





all gaps were a little too tight for my 0.030" gauge and way loose on the 0.025... I thought they are supposed to be gapped 0.032 ?

anyways, I'd say that for 75000 miles, these plugs look pretty good.

edit: ok, Ford says gen2 uses 0.028 gap. hmmm, NGK says their ruthenium plugs come gapped 0.031" (0.8mm)

 

[SyndicateZ]

So after reading about high mileage spark plugs causing a decrease in mileage, and wondering why I wasn't seeing the sorts of gas mileage others report, I figured 75000 miles wasn't too soon to put in new plugs, just got 6 NGK Ruthenium HX installed.

These are the plugs that were pulled...

View attachment 81382

View attachment 81383

all gaps were a little too tight for my 0.030" gauge and way loose on the 0.025... I thought they are supposed to be gapped 0.032 ?

anyways, I'd say that for 75000 miles, these plugs look pretty good.

What type of gas milage u getting?

 

[Left Coast Geek]

kind of all over the place, but mostly 13-17 when not towing, 12-13 when towing a fairly streamlined 4500 lb trailer at a steady 60-65 MPH.

 

[Hellwig]

They don't look bad.

 

[Hellwig]

kind of all over the place, but mostly 13-17 when not towing, 12-13 when towing a fairly streamlined 4500 lb trailer at a steady 60-65 MPH.

Similar to mine. When doing highway and not towing, I got 21 to 22 mpg.

 

[Old Gearhead]

On a turbo, I change mine every 60K. I get anywhere from 20-23 on highway regardless of speed. Everyone once in awhile, I will approach 24 but that is a rarity.