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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > should i change the oil when changing spark plugs??



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      01-11-2012, 12:07 PM   #1
rami335i
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should i change the oil when changing spark plugs??

I want to change the spark plugs on my 335i with 30k on the clock. i think i have read somewhere that it is best to change the oil when putting in new spark plugs.
My car is out of warranty and maintenance.
any expert advice?
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      01-11-2012, 01:40 PM   #2
Tom K.
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BMW calls for plug changes at 45,000 miles on the 335i. This is independent of time or CBS based oil changes.

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      01-11-2012, 02:18 PM   #3
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you probably read it's good to change the coils when changing spark plugs. As in ignition coil packs, since you have to remove them to get to the spark plugs anyway.

but at 30k, you wouldn't need to change them.
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      01-11-2012, 02:18 PM   #4
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no...

unless your car is calling for an oil change...
unless you want to do an oil change...

ppp
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      01-11-2012, 02:54 PM   #5
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Quote:
Originally Posted by Potty_Pants View Post
no...

unless your car is calling for an oil change...
unless you want to do an oil change...

ppp
basically the oil was changed 9 months ago and since then drove the car for only 2,000 miles. is there any harm leaving the oil for over a year as long as m not putting many miles on the car?
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      01-11-2012, 02:59 PM   #6
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Quote:
Originally Posted by rami335i View Post
basically the oil was changed 9 months ago and since then drove the car for only 2,000 miles. is there any harm leaving the oil for over a year as long as m not putting many miles on the car?
personally I'd prefer to change my oil more then once a year... but i've got bigger concerns atm. so I do once a year oil changes. I too have low miles around 4-5k per year.

please note lack of driving and failure to get oil up to operating temp is just as bad as high miles before an oil change. So yes you should change your oil at a minimum once a year.

ppp
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      01-11-2012, 03:17 PM   #7
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Quote:
Originally Posted by Potty_Pants View Post
personally I'd prefer to change my oil more then once a year... but i've got bigger concerns atm. so I do once a year oil changes. I too have low miles around 4-5k per year.

please note lack of driving and failure to get oil up to operating temp is just as bad as high miles before an oil change. So yes you should change your oil at a minimum once a year.

ppp
I have a short drive to work, oil temps do not usually go above 160F, but once or twice a week i take the car and drive it hard for an hour so the engine can burn the moisture in the oil.
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      01-11-2012, 05:14 PM   #8
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if bmw offers a low mileage oil change at 1 yr intervals... they must have a reson for it.

perhaps somebody else can chime in and state why going over a year is a bad idea even on low mileage cars.

thanks

ppp
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      01-11-2012, 05:59 PM   #9
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The base additives in oil (to prevent it from going acidic) get used up/aged out. You should change your oil at least once a year, even if you only put a couple thousand miles on it, even if you warm it up all the way, etc. If the oil goes acidic from atmospheric contaminants, it can begin to damage the steel components in the engine.
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      01-11-2012, 07:00 PM   #10
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Quote:
Originally Posted by Potty_Pants View Post
if bmw offers a low mileage oil change at 1 yr intervals... they must have a reson for it.
They do in North America due to the quality of our fuel. But in Europe, I believe the recommended time based interval is 2 years. As the OP is neither in Europe nor the US, he should probably check the recommendation in his Service/Warranty manual or contact his local dealer.

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      01-11-2012, 07:44 PM   #11
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Nope, changing oil is not mandatory. Unless your car is due for an oil change.
Our spark plugs are good for 100k I believe.
My car has over 102k original plugs.
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      01-11-2012, 10:32 PM   #12
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Quote:
Originally Posted by bumere90 View Post
Nope, changing oil is not mandatory. Unless your car is due for an oil change.
Our spark plugs are good for 100k I believe.
My car has over 102k original plugs.
OP has a turbo 335i - 45k on plugs.

Tom
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      01-11-2012, 11:33 PM   #13
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thank you all for the great advice. I love my car too much to risk oil staying for too long in it. i will buy some oil and change it by the time it gets close to one year.
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