Help reading these N63TU spark plugs

[filtercoffee]

Here are the plugs out of my 2013 750i at 60K miles, anyone here with some mechanic experience able to read them and let me know what they see? Is this normal wear?

Prior to replacing I had misfires on hard acceleration. After new plugs, the issue is resolved.

[7'er-addict]

Interval is 40,000 miles, they just look like used plugs that carbon fouled, how much oil do you burn?

[filtercoffee]

Yeah, big improvement after changing them. Didn't know the interval is 40K, oof.

It'll still misfire on multiple cylinders on 100% WOT at 4-5K RPM, but other than that it runs brilliantly. Feels perfect at 95%, but when I absolutely floor it, the issue re-occurs. My theory is the injectors are coked up. Given how nasty the spark plugs look, it's reasonable to think the injectors look the same on the outside. I'm running some fuel injector cleaner through to see if it'll fix the issue...

Oil: not sure actually.

[JellyStyle]

valve seals need to be replaced.
you are burning a lot of oil, plugs do not look like that in a 4 cycle engine unless you're cooking tons of oil.

the misfire you are getting at WOT is a bad coil pack, something else that has top be replaced every 50k miles or 25k if you run mods..

[7'er-addict]

Originally Posted by JellyStyle

you are burning a lot of oil, plugs do not look like that in a 4 cycle engine unless you're cooking tons of oil.

Not necessarily, I mean, yes, most cases, yes.

I have a 2014 MINI Countryman Base in the shop now. Original spark plugs at 70,000 miles look worse for carbon fouling than the ones in OP's photo. That car drank a half quart per 7,000. Exceptionally good for oil consumption.

I think in this case if the OP isn't sure how much oil it is burning, that it can't be burning all that much. It just seems as thought the plugs were well past their due date (:

[7'er-addict]

Originally Posted by JellyStyle

you are burning a lot of oil, plugs do not look like that in a 4 cycle engine unless you're cooking tons of oil.

Not necessarily, I mean, yes, most cases, yes.

I have a 2014 MINI Countryman Base in the shop now. Original spark plugs at 70,000 miles look worse for carbon fouling than the ones in OP's photo. That car drank a half quart per 7,000. Exceptionally good for oil consumption.

I think in this case if the OP isn't sure how much oil it is burning, that it can't be burning all that much. It just seems as thought the plugs were well past their due date (:


In terms of misfire, I would certainly start cheap at coils. But I would also like to see live data of fuel trims at WOT first before throwing those in.

My Range Rover has a Velocity AP tune on it for 605HP. It was breaking up in the high RPM WOT, and unfortunately it turned out to be the injectors. Stock map it was fine, we just tuned in for fuel and that stuck a bandaid on the issue. I'm not throwing $800 worth of injectors on a truck that I'm selling soon.