You have to consider the varoicam function in your opinion and not the startup noise some may have. Thicker oil may not work well with the varoicam as the BMW vanios does not like some oil viscosity as well.

 

No it isn't. You are right. But OEM spec is also for stock cars (combo for cold / hot climate). If you are running 100bhp more and are based in a hot place, ask yourself a few questions...

When I was living in the UK, my car hardly ever turned on engine fans. When I am bombing down Tuscany in Italy, the fans are on all the time. The rear deck lid fan runs for 15 minutes when I shut the car off. So the math becomes real simple...

 

The list I saw was for North America (US CAN MEX). And on modified cars, I never heard anyone modifying the varoicams functions. Maybe changing to GT3 heads, but not sure if they still have the varoicam. Then it may be ok without the varois to up the viscosity.

 

In God we trust...all others bring DATA. Terminator you are quite emotional about this (to the point of calling someone a moron...) really....and you show NO data. At least read what Doug Hillary has to say about oil (search...he is also on BTOG). He has actually got data to support his theories.

 

Actualy you haven't seen me emotional yet.

Here is some factual data for you.

100k miles in 6 years. Quite a bit of racing. Hard driven. Using 10-60 and 5-50 in winter. 530 bhp. Engine using 1dcl of oil per 1000 miles. ;-).

Theoretical data? Yeah sure! I have MSc too. My thesis were easy, real life proved totally different.

Anyone who says that 0-40 and 10-40 have same viscosity is a moron. Surely you aren't serious in needing data for that.

Just google it plenty of data around. If you can't find it I will gladly provide it. ;-).

 

Obviously you don't understand...there is no such thing as factual data...only data. The degree of belief you have it depends on how the data was acquired (including knowing the measurement system uncertainty). Theoretically the measure of 40 weight is supposed to be the same across all brands, etc. Of course this is debatable. Multi-weight oils all vary as well, but theoretically the 0 weight should be less viscous than the 10 at colder temperatures...the 40s should be identical.

Name calling is certainly not useful or productive.

Seriously read Doug Hillary's posts.

 

Dear Wross, I think you might be in error, I understand epistemology all to well ;-).

My weakness is that I love name calling. I fear that the society is getting way to polite in expressing opinions it's getting kind of boring. :-).

Seriously, will read Doug's posts with interest then get back to you.

However, in the meantime I am keeping 10-60 in my car. ;-).

 

Well made without overcomplicating things...

 

That would be TOO well...LOL. And what weight oil you use is entirely up to you.

Enjoy your readings.

 

I don't think you are getting it that our cars have variocams that require a certain viscosity to work properly.

You can run whatever oil you want, but I want to be sure others reading this thread do not assume our cars can run the same oils a Mustang can. Not apples to apples...

No your car will no blow up, but as BMW owners are well aware of, it does matter when small passages and oil activated devices are built into the car. Plus no oil greater than 5W (cold) is on the Porsche approved list.

PSA done.

 

Thanks for fixing my typo. Was that after you googled epistemology? Lol. You are right, what oil people use is their own preference indeed.

 

Never mention TIRES-exhausts-and especially OIL now lets all say it together= ok one more time lol.

 

Your statement about variocams is totally inaccurate. Variocams are not affected by running 10/60 viscosity oil. Which internet myth did you buy into? THINER OIL IS USED MAINLY BECAUSE OF THE EVER MORE STRINGENT EMISSION PURPOSES and for cold winter starting. They need to make sure Porsches will run in both hot and cold climates. Therefore, compromise is put in place. Interesting that for the GT2RS the Porsche recommended oil is 5/50. Why didn't they stick to 0/40? Because car runs hotter! With increased heat oil loses lubrication properties. FACT! Thiner oil = less lubrication when engine is hot. PERIOD. Also, unless you live in areas of prolonged cold winters who cares about 0 or 5? 10-60 will go down to -25 Celsius. I live by the alps and we go to -20 max. Ask yourself an important question; where do our engines spend most of their time? Starting, running cold or at operating temperature? Since my car isn't stock anymore (530bhp) and spends most of it's time at operating temperature or running hotter, I know what oil is best for it. ;-). You in the mean time are making sure you are protecting it at starting, running cold for 10 miles and are looking after your variocams. So, when you are blasting you car at 150mph for prolonged periods on a hot day you can be assured your engine is at that stage lubricated by water. ;-). Oh I forgot, you haven't the autobahn in the States so you should be perfectly fine with the -5/20 viscosity oil.

I said at the beginning not another oil thread. :-0!

I knew this debate will end up like this. I am now out of this topic. Lets just all agree we disagree. ;-). At the end of the day, who cares what we think but ourselves. :-).

 

Ok! :-). I promise.

 

I know right... I am still looking for info on the Variocams detailed function at the diferent rpms and the state that the system is in for each rpm relating to pressure that drives the system. this will tell if under low speed and if pressure is needed to move the components into the low speed position. my feeling is that it is normaly in the high speed positon and without adequate pressure to activate into the low speed position it stays in the high speed position. this is how it felt ...