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Forced Induction Forum Sponsored by Active Autowerke
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Old 04-30-2010, 11:23 AM   #1
DubVersion
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Join Date: May 2009
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Engine oil and supercharger oil

Hi guys,

As i said before, i'm not a mechanic, but i have tried to get answers for the following two questions:

- What oil is best for my non M boosted E46 ?
- What oil is best for my Lysholm supercharger ?

First i did some research on the type of oils, and it surely seems that (fully) synthetic oil is best. My 325 ti manual says i should get 0W30 - 5W30 engine oil. Due to the low viscosity of the cold oil, it should protect your engine very well at low temps. However, at high temps, the oil becomes very thin; more than 100 % thinner, than say 10W60. Thin is good at low temps, but too thin at high temps apparently produces more noise. Though it lubricates well, it's not helping enough with the heat soaking.

The M series BMW's suggest to use Castrol TWS 10W60 oil. It's quite thick at low temps and i imagine with such oil you should really avoid high revving your car when the engine is still cold.

Now i use my car every day for just a few miles, maybe 10 a day. Since my car will be cold, i think it's okay to keep my Castrol Edge 0W30.

But because of the supercharger, and the way it burns fuel inside the cylinders, the temperature will definately go higher in a boosted engine. It is for this reason that BMW recommends the 10W60 in their performance M series.

I have talked to Hans Kirkerod of ESS in Norway and he roughly said the following:

- In a boosted BMW, just use Castrol 10W60 TWS. It's the better oil (type) for high performance cars, in particular boosted once, dealing with higher temps. So in fact, he says i'm better off with 10W60 oil , than the recommended oil of BMW's manual for my 325ti (i.e. 0W30 )

I have tried to get in contact with Lysholm, but to no avail yet. Hans said - as it's written in their tutorial about supercharger maintenance - to please use the Castrol 10W60.

So to make a long story short: boosted BMW's are well off with Castrol 10W60 TWS oil in both engine as supercharger.

I'm getting the oil change for the super charger tomorrow.

I've read on several occasions that it's no problem mixing different oil types in the engine; you don't necessarily have to drain your engine to get it on 10W60. Hans did mention that it's generally NOT a good idea to keep swapping between oil types. Stick with one.

As a side note, i wonder if 0W30 or 5W30 will be recommended again in case you've fitted your engine with a Water meth injection, as it will cool down the engine significantly again....

Anyways, i though i'd share this info, probably most already know. Any feedback is welcome.

greetings,

dub
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Old 04-30-2010, 07:02 PM   #2
lkstaack
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Join Date: Jan 2006
Location: San Diego, CA
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Quote:
Originally Posted by DubVersion View Post
I have talked to Hans Kirkerod of ESS in Norway and he roughly said the following: In a boosted BMW, just use Castrol 10W60 TWS. It's the better oil (type) for high performance cars, in particular boosted once, dealing with higher temps. So in fact, he says i'm better off with 10W60 oil , than the recommended oil of BMW's manual for my 325ti (i.e. 0W30 )
That's great info. I wish I knew that before my last oil change.
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Old 11-13-2013, 08:40 AM   #3
AndyN
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Apologies for the thread revival but I need to know...

Are any other non-M Twin screw drivers using 10W60 instead of 5W30?

It seems to make alot more sense to use 10W60 as the temperatures can get very very hot in the engine bay!
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Old 11-13-2013, 05:41 PM   #4
Minnoe07
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I use Castrol 5w-40 for my ESS ts2 engine and 10w-60 for the supercharger.
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Old 11-14-2013, 01:41 AM   #5
HighBoostin330
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Quote:
Originally Posted by AndyN View Post
Apologies for the thread revival but I need to know...

Are any other non-M Twin screw drivers using 10W60 instead of 5W30?

It seems to make alot more sense to use 10W60 as the temperatures can get very very hot in the engine bay!
When I had my TS3, I ran TWS 10W60 in my engine as well as the supercharger. It certainly helped when I was tracking in 100+F temperatures.
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