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M2 Technical Topics > Mechanical Maintenance: Break-in | Oil & Fluids | Servicing | TSB | Recalls > Spark Plug change frequency

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      05-08-2020, 04:32 AM   #1
tranck
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Spark Plug change frequency

Is there a general consensus on mileage intervals? I've read a lot of back and forth on this.

I have a Dinan stage 1 tune on my 2018 LCI M2 and I was told that I should have the plugs changed at least every 30K miles.

Last time I had them changed was 33K - car now has 59K - I don't track it - seems to run fine.

But when I *do* get on it, I want the car to run at its best.

What do you guys think?

Lastly, was quoted $498 out the door - is that a good price?
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      05-08-2020, 06:19 AM   #2
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30k miles is the official interval.

15-20k is recommended for tuned cars depending on aggression of the tune.
Personally I'd do it every 15 just to make things easier to keep track along with 5k oil changes.

$498 is including labor and parts? If so I'd say that's a bit on the high end
Plugs are about $100 and should be about 2 hours of labor.
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      05-18-2020, 09:16 PM   #3
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NGK 1 step colder spark plugs 97506 are great for tuned cars. Gapped at .022-.023

I just recently replaced the stock ones after 11k miles life on them. It was throwing misfire codes with an aggressive tune with high octane fuel. Now the car runs great!
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      05-19-2020, 06:36 PM   #4
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Holy crap $500? That's so much money. Spark plugs are a really easy job to do, it would cost around $10-12/plug so $72 at most, and maybe 30 mins if you are fast and 1-2 hours if it is your first time (cylinder 5-6 is a pain).
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      05-25-2020, 02:03 PM   #5
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What should be the gap for the OEM plugs?
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      05-25-2020, 02:22 PM   #6
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Quote:
Originally Posted by nioh_lbbm2 View Post
...5k oil changes.
Unless you're a hard-core track addict, I think that's a bit much. No reason at all you shouldn't be able to get 10K between changes.

I plan to send my used oil to Blackstone this time around to see how it looks at the BMW oil-change interval.
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      05-25-2020, 02:41 PM   #7
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Quote:
Originally Posted by VisualEcho View Post
Unless you're a hard-core track addict, I think that's a bit much. No reason at all you shouldn't be able to get 10K between changes.

I plan to send my used oil to Blackstone this time around to see how it looks at the BMW oil-change interval.
True it's very possibly over kill. From what I've seen from a couple other F87 enthusiast Blackstone UOA results have shown 7500 or more mile intervals are sufficient but for my own peace of mind I chose to do 5K intervals since it's easier to keep track. I plan to keep the car until I drive it into the ground
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      05-25-2020, 03:07 PM   #8
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Quote:
Originally Posted by nioh_lbbm2 View Post
True it's very possibly over kill. From what I've seen from a couple other F87 enthusiast Blackstone UOA results have shown 7500 or more mile intervals are sufficient but for my own peace of mind I chose to do 5K intervals since it's easier to keep track. I plan to keep the car until I drive it into the ground
Better safe than sorry for sure.
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      05-26-2020, 02:10 AM   #9
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As we all know, fresh oil is a car's life blood - every 4K miles for me.
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      05-26-2020, 02:57 AM   #10
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Quote:
Originally Posted by squixs View Post
What should be the gap for the OEM plugs?
I forgot but it was either at. 025 or. 30
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      05-26-2020, 07:50 AM   #11
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Quote:
Originally Posted by D CHOI View Post
NGK 1 step colder spark plugs 97506 are great for tuned cars. Gapped at .022-.023
Are the 97506 plugs 1 step colder or 2 steps? I thought there was another plug in between that was 1 step colder and 97506 was 2 steps?
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      05-26-2020, 05:46 PM   #12
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Weirdly, the dealership replaced mine at last service. 18k miles and fully covered. Was pretty surprised they did it so early, but here we are.
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      05-26-2020, 06:13 PM   #13
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Quote:
Originally Posted by pz619 View Post
Weirdly, the dealership replaced mine at last service. 18k miles and fully covered. Was pretty surprised they did it so early, but here we are.
Was it your third year of ownership? The default maintenance plan is every year or every 10k miles. Whichever is first
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      05-27-2020, 01:16 PM   #14
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Quote:
Originally Posted by nothingman View Post
Quote:
Originally Posted by D CHOI View Post
NGK 1 step colder spark plugs 97506 are great for tuned cars. Gapped at .022-.023
Are the 97506 plugs 1 step colder or 2 steps? I thought there was another plug in between that was 1 step colder and 97506 was 2 steps?
It looks like it's 1 step colder.

https://bootmod3.atlassian.net/wiki/.../pages/2558945
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      05-28-2020, 01:53 PM   #15
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Mine came up at a weird time. The car was put on the road 05/2017, brake fluid replacement came up for 05/2020 so that makes sense but the spark plugs are due 07/2020. The car has less than 20k miles.
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      05-29-2020, 03:47 PM   #16
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I swapped in the 97506's gapped .022.

I swear the car is getting 1.5-2.5 better HGWY MPG.

ECUTEK Stage 2 next week...
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