New Spark Plugs dramatically improves mileage
08-18-2008, 04:41 AM
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My Ride: '04 530i Mystic Blue, European Delivery, Steptronic, Prem Pkg, Cold Weather Pkg, Nav, Heads Up, Active Cruise, Rear Sunshade, Rear Side Airbags, Rear Seat Heating, Park Distance Control, Xenon, CPT9000 GSM phone, red rear reflectors, Sirius!!!!
I installed new plugs (DIY project) in my 2004 530i at 100k miles and saw a dramatic increase in mileage. I drive between Raleigh, NC and Charlotte, NC every Monday morning (about 180 miles) and normally average 27 mpg. This morning I achieved 31 mpg. I expected some improvement, but not 4 mpg on the same route under the same conditions. Anyone else have similar experience? I regret not having changed the plugs a year ago.
NC530i
NC530i
08-18-2008, 07:28 AM
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My Ride: 2007 530xi, Monaco Blue Metallic, Beige Dakota Leather, Dark Popular Trim, Steptronic, Premium Pkg., Cold Weather Pkg., Heated Rear Seats, Navigation, Sirius,
2004 330cic convertible, Mystic Blue Metallic, Grey Dakota Leather, Myrtle Wood Trim, Rare Myrtle Wood & Leather Sport Steering Wheel, Premium Pkg, Sport Pkg, Xenons, Navigation, Heated Seats, Park Distance Control
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I have always replaced plugs at 50K miles. (They say platinum plugs last 100K but I don't know about that 
) Oil and Plugs are the cheapest way to keep and maintain your car running at it's peak 
) Oil and Plugs are the cheapest way to keep and maintain your car running at it's peak
08-18-2008, 09:00 AM
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Originally Posted by panaguy' post='649076' date='Aug 18 2008, 10:28 AM
I have always replaced plugs at 50K miles. (They say platinum plugs last 100K but I don't know about that ) Oil and Plugs are the cheapest way to keep and maintain your car running at it's peak
) Oil and Plugs are the cheapest way to keep and maintain your car running at it's peak Never been a big fan of letting plugs go to a 100K.
08-18-2008, 09:17 AM
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Originally Posted by skylolow' post='649157' date='Aug 18 2008, 08:00 PM
+1
Never been a big fan of letting plugs go to a 100K.
Never been a big fan of letting plugs go to a 100K.
BR from Finland,
Jukka
08-18-2008, 10:44 AM
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I changed them in 75K miles,. and it runs very smooth now. By the way I use the new tech spark plugs named Pulstar Plugs. Very good! and I don't have any problem with them until now.
08-18-2008, 12:58 PM
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Model Year: 2004
It's been about 10-15 degrees cooler in the AM in the Carolina's this past week. Wonder if that could also have helped the fuel economy.
08-18-2008, 02:56 PM
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My Ride: '04 530i Mystic Blue, European Delivery, Steptronic, Prem Pkg, Cold Weather Pkg, Nav, Heads Up, Active Cruise, Rear Sunshade, Rear Side Airbags, Rear Seat Heating, Park Distance Control, Xenon, CPT9000 GSM phone, red rear reflectors, Sirius!!!!
Originally Posted by Ceenit' post='649330' date='Aug 18 2008, 03:58 PM
It's been about 10-15 degrees cooler in the AM in the Carolina's this past week. Wonder if that could also have helped the fuel economy.
08-18-2008, 04:46 PM
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Originally Posted by miguex' post='649230' date='Aug 18 2008, 01:44 PM
I changed them in 75K miles,. and it runs very smooth now. By the way I use the new tech spark plugs named Pulstar Plugs. Very good! and I don't have any problem with them until now.