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07-03-2021, 12:18 PM
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#1 |
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Solving problems
Join Date: Oct 2003
Carmudgeonly Ride: M5 / 718 GTS / Cooper S / GTI / LR4
Location: Metro Boston
Posts: 25,248
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M3 sparkplugs after 3 years?
Dropped off the F80 for its final free oil change and was told it was due for a break fluid flush, cabin air filter, and spark plugs.
The car is 3 years old with 10,552 miles.  It's all free, which is great, but the plug service surprised me. |
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07-03-2021, 12:57 PM
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#2 |
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The old cranky SOB....
Join Date: Oct 2003
Carmudgeonly Ride: several cars... way too many....
Location: Near Seattle
Posts: 4,798
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Yeah - I would have expected the plugs to be more of a mileage thing than a time thing... or whatever happened here....
Oh well, free is free. 
__________________
Kevin  1970 2800CS - - 2001 740iL - - 2006 997.1 - - 2012 Escalade 1968 Mustang GT Convertible - - 2003 Ford F250 PSD - - 1985 728i |
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07-03-2021, 01:04 PM
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#3 |
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Carmudgeon
Join Date: Apr 2005
Posts: 4,665
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I always go by the manufacturer’s recommendation, what does the manual say ? I know in my 911 I had the spark plugs changed at probably around the close to that mileage but I think Porsche recommended it at the 5 year service …
Sometimes I look back and can’t believe the amount of maintenance I put into that car due to age rather then mileage. |
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07-03-2021, 01:41 PM
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#4 |
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195
Join Date: Oct 2003
Posts: 24,607
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Plugs are every four years on the 987, regardless of mileage. Looks like the S55 M3 interval is indeed every 3 years.
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07-03-2021, 09:12 PM
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#5 |
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Relic
Join Date: Oct 2003
Location: Bethesda, MD
Posts: 12,456
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On the S65, BMW was using the spark plugs for knock detection. So spark plug condition is absolutely critical. Maybe the S55 is also doing that?
__________________
2011 M3 2006 Sierra 2500HD 4WD LBZ/Allison 2004 X5 3.0i 6MT 1995 M3 S50B32 1990 325is 1989 M3 S54B32 Hers: 1989 325iX 1996 911 Turbo 
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07-04-2021, 12:51 PM
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#6 |
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Relic
Join Date: Oct 2003
Location: Bethesda, MD
Posts: 12,456
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Nope. Looks like they went back to knock sensors on the S55. I wonder what the reasoning was?
__________________
2011 M3 2006 Sierra 2500HD 4WD LBZ/Allison 2004 X5 3.0i 6MT 1995 M3 S50B32 1990 325is 1989 M3 S54B32 Hers: 1989 325iX 1996 911 Turbo
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07-04-2021, 05:23 PM
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#7 | |
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No more BMWs
Join Date: Apr 2005
Carmudgeonly Ride: Ram, MS3, CX-5, RX-8
Location: Glenwood, MD
Posts: 14,753
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Quote:
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07-04-2021, 08:56 PM
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#8 | |
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Relic
Join Date: Oct 2003
Location: Bethesda, MD
Posts: 12,456
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Quote:
Run plugs too long in an S65, and it’ll cost you 30-40hp.
__________________
2011 M3 2006 Sierra 2500HD 4WD LBZ/Allison 2004 X5 3.0i 6MT 1995 M3 S50B32 1990 325is 1989 M3 S54B32 Hers: 1989 325iX 1996 911 Turbo
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07-05-2021, 12:13 AM
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#9 | |
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Solving problems
Join Date: Oct 2003
Carmudgeonly Ride: M5 / 718 GTS / Cooper S / GTI / LR4
Location: Metro Boston
Posts: 25,248
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Quote:
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