Hello folks,
I've a BMW 330D with the M57N engine (204bhp/410nm@1500rpm)
I'm South African based in France. My French BMW dealer uses BMW Long Life LL04 5W30 across the range as standard. You do have the option of a 0W30 but it's never that cold to warrant the use of a 0W. For the M3/5 they use Castrol TWS 10/60. WHatever they use, it's always Castrol.
IF I was in South Africa, we'd be using a 10W40 as the temperatures are rarely less than -5°C in winter or more than 35°C during summer.
In France it's never less than -10°C in winter or more than 30°c in summer, where I am. You could get one or two days with 32°C, or even 40°c as it was once or twice, but thats unusual. Most summer temperature in France is 20°C to 28°c.
Questions :
- What is the upper limit in ambient temperature for a 5W30 BMW LL04 oil?
- What is the upper limit in the ambient temperature for a 5W30 oil that is not necessarily LL04 approved?
- If I drive 200km, at 160km/h or if I drive 900km, towing a Caravan at 130km/h, do you think the 5W30 BMW LL04 is up to the task or should I be using a 5W40 BMW LL04, if I'm in French summer.
Personally, I like the 5W30. Engine is free revving, I have done 30 000km inbetween oil service, without adding oil. I know that the 5W40, if used at too low operating temperature creates drag and is also resposible for turbo lag in the VGT type turbo. 5W30 is also supposed to have a better flow rate, getting to where it's needed faster than a 5W40 would. Ambient temperature aside, the engine itself has a normal operating temperature. I don't know what this is, and if the 5W30 or the 5W40 would be better suited.
I just need condfidence that if I went to Germany, 5W30 in the engine, I could cruise at 200km/h for say 50km, without destroying my engine.
Brgds
Vernonfr35