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View Full Version : what kind of oil should i be using in a 86 325


notjoe
07-23-2006, 12:38 PM
Hey guys,

Just bought a 86 325 and it needs oil. What type of oil should i be putting in this?

Thanks,

Joe

Jordan
07-23-2006, 01:57 PM
whatever is on sale.

King Luis
07-23-2006, 07:25 PM
what have you been putting in it before?

brent-E30
07-24-2006, 04:24 PM
if you searched the forum first you would have found an answer theres a few threads about with oil is best, i use lucas 10/30 synthec, but everyone has there own prefered oil.

RobY330i
07-24-2006, 06:35 PM
Unless it's been using synthetic all it's life, use the regular stuff.
10W-30. In this case, the name brand doesn't matter.

notjoe
07-24-2006, 06:37 PM
I just bought the thing. I asked the owner and he has been using mineral so that is what i am going to use as well. As for the weight, he used 10w30. Can you switch to 5w30 in the summer and back to 10w30 in the winter?

Mystikal
07-24-2006, 07:37 PM
Oh ****ing hell.

20W-50 summer, 10W-40 winter. Non-synthetic.

Running 5W-30 or 10W-30 in an M20 motor is suicide in anything above -10.

notjoe
07-24-2006, 07:39 PM
My bad, lighter weight in the winter and heavier weight in the summer ;)

Thanks for the pointer !

Mystikal
07-24-2006, 07:50 PM
No prob Joe. And if you can get your hands on the owner's manual, you'll see what I mean.

T.Dot_E30
07-24-2006, 07:54 PM
Oh ****ing hell.

20W-50 summer, 10W-40 winter. Non-synthetic.

Running 5W-30 or 10W-30 in an M20 motor is suicide in anything above -10.

Listen to him, he speaks the truth.

Mavrick
07-24-2006, 08:04 PM
Running 5W-30 or 10W-30 in an M20 motor is suicide in anything above -10.

Can you justify this or what? Our 88 has nearly 300 000km on it and we run 10-30 or 10-40, whichever is on sale.

Mystikal
07-25-2006, 12:22 PM
Sure, what do you need me to justify it with? Original BMW documentation, numerous repair manuals, speaking with certified BMW technicians, seeing how mint the inside of my 314k motor that always used these grades was...name one.

For an easy start, take a look at your owner's manual, and take it from there.

PTM
07-26-2006, 01:32 AM
Most german cars require thicker viscosity to protect the bearings. If you use non synthetic oil it is best to use 15W40 for summer. most 10W40 use tons of VI (viscosity improvers) to stretch the viscosity from 10 to 40.

I use Lubromoly 15W40 which is one of the best non synthetic oil in the market. It is designed for Diesel engines so it is rated as a HD motor oil which is good for longer OCI.
http://www.precisiontuning.ca/catalog/product_info.php?cPath=43_47_53&products_id=57

arsevader
07-26-2006, 10:09 AM
Oh ****ing hell.

20W-50 summer, 10W-40 winter. Non-synthetic.

Running 5W-30 or 10W-30 in an M20 motor is suicide in anything above -10.

Fo sho. Though 5W-50 is good for winter also.

- James

chromius
07-26-2006, 05:14 PM
Can you justify this or what? Our 88 has nearly 300 000km on it and we run 10-30 or 10-40, whichever is on sale.

Mystikal is absolutly right. Unless you live within the arctic circle, 10-30/40 is too light for summer use. It can be easily justified by looking at the oil temps seen in summer.

Luke318is
07-27-2006, 12:15 AM
Unless it's been using synthetic all it's life, use the regular stuff.
10W-30. In this case, the name brand doesn't matter.


Where did u get ur trunk spoiler?

PM SENT

Luke318is
07-27-2006, 12:17 AM
Mystikal is absolutly right. Unless you live within the arctic circle, 10-30/40 is too light for summer use. It can be easily justified by looking at the oil temps seen in summer.


What about 20-50?

chromius
07-27-2006, 12:37 AM
What about 20-50?

20-50 is the ideal for summer if talking about Non synth.