Redline 10w60 or LiqiMoly?

94jedi wrote

Thanks for all the input guys, thinking of picking up 3 qts of their 5w40 to thin it out, as suggested. 6:3 10w60:5w40 seem ok? It gets hot here in NC and under spirited driving I'd like to have that piece of mind.

That averages out to 5.33 HTHS (fresh oil)

330indy wrote

That averages out to 5.33 HTHS (fresh oil)

I have questions with "blending" oils of different viscosity.

I blended Redline 10w60 and 0w40 (7:2) this time. Prior to this, I used BMW TPT 10w60 which saw ~1L consumption in 1500km.

So far my oil consumption is reduced to ~400ml per 3,000km including two track days, one at Okayama international (30 full out laps with some traffic). You can see that oil consumption is noticeably reduced, all conditions except oil filler cap (changed to E46 M3) stayed equal.

My questions are:

1. I would have to say oil viscosity is proportional to oil consumption in our engines. Would it be the case that fluid of 0w40 kinematic viscosity inside the total fluid is the main culprit in oil consumption?

2. I would have to assume oil viscosity of 0w40 and 10w60 achieve their grades with different properties. Does averaging kinematic viscosity work with evenly blending oil properties?

kyrix1st wrote

I have questions with "blending" oils of different viscosity.

I blended Redline 10w60 and 0w40 (7:2) this time. Prior to this, I used BMW TPT 10w60 which saw ~1L consumption in 1500km.

So far my oil consumption is reduced to ~400ml per 3,000km including two track days, one at Okayama international (30 full out laps with some traffic). You can see that oil consumption is noticeably reduced, all conditions except oil filler cap (changed to E46 M3) stayed equal.

My questions are:

1. I would have to say oil viscosity is proportional to oil consumption in our engines. Would it be the case that fluid of 0w40 kinematic viscosity inside the total fluid is the main culprit in oil consumption?

2. I would have to assume oil viscosity of 0w40 and 10w60 achieve their grades with different properties. Does averaging kinematic viscosity work with evenly blending oil properties?

A thicker oil alone may not be the primary reason for reduced consumption. It is a big part of it, but not all of it. Red Line and the BMW/Shell oil have very different chemistries and additive packages. Every engine and driver are different so sometimes you need to experiment to see what works best. If you've found a combination that can maintain oil pressure while reducing consumption, then stick with it -- but that exact blend may yield different results for another owner.

You can estimate the new viscosity with simple algebra, yes, but that's not going to be perfect due to standard manufacturing variances. The spec sheets are just showing you the approximate viscosity/specs, not the actual. Send in a sample of brand new oil to be tested -- it will not match the spec sheet exactly. I have seen viscosities off by as much as 10% and additives off by just as much.

I only use 10w 60 liqui moly or motul 10w 60. While pressing the car hard it very seldom moves over the half way mark. Under normal driving in power mode the temps is at 3/4

Several Years later,
wondering if people are still using 10w60 Redline or another brand?

I am looking for suggestions

Motul 8100 10w60

BigTee wrote

Motul 8100 10w60

Motul Ester 5w50

I started this thread two e9x's ago lol!

I am recently new to the e9x world, I have been reading, they are some oils that give you the less ticking noise.

Any feedback on CASTROL 10W60?

786BMW786 wrote

I am recently new to the e9x world, I have been reading, they are some oils that give you the less ticking noise.

Any feedback on CASTROL 10W60?

Castrol is the offciial oil for this car, so yes, Castrol 10w60 is a great choice. It's gone through different names and versions, but currently, I think it's being referred to as Euro car, and you'll see it recommended for BMW M and others like Audi R8

https://www.fcpeuro.com/products/bmw-10w60-oil-change-kit-motul-11427837997kt1

My 2¢ [original owner `08 &`12 e92 M3s]...
Ran recommended BMW Castrol [various branded versions] exclusively ~8 yrs.
Opted for LM in`12 M3 beginning 2016.

• Under 'certain conditions' like from cold start, somewhat detectable difference compared to Castrol. Aside from that, no big deal once at op temps.
• Valve covers - - switched to NRWs AL alloy vs OE magnesium => VT 'noise' somewhat more noticeable from OEs.

IMO, a slight increase in audible mechanical sound, particularly with AL covers...fine by me, so long as no performance or other mechanical degradation.

Never tried Redline. To my knowledge, LM presents no apparent risks...of course, opinions and YMMV

786BMW786 wrote

Several Years later,
wondering if people are still using 10w60 Redline or another brand?

I am looking for suggestions

The redline that got popular to use (still is?) with s65/s85 is Redline's 5w50 not 10w60. Redline is race oil. They're higher in viscocity than other brands within the same rating like 10w60.

It's overkill imo.