///M Engine Oil Service Pack

[ALBundy]

Would it benefit the forum if I would do a 1 week offer for RM75.00 a bottle for the TWS?

Cheers!

Kevin,

We are not operating pasar malam here.

The guidelines have been spelt out to you and the decision is yours to make.

Cheers

 

[astroboy]

Astroboy,

You are like a kid. Prob you have never driven a M or a high performance car. Everyone knows what viscosity is. Just stick to your Lego forums dude.

This one ka? http://messageboards.lego.com/en-US/showforum.aspx?ForumID=1028

Cannot find anything about engine oil viscosity le.. u have the exact link?

 

[t2ribena]

Albundy,

I didnt say oil temp isnt important but I would pay more attention to oil pressure is because, for me oil press shows the health of my engine rather than an oil temp. If you know your car well, you should know the rough figure of oil pressure on every load and rpm.

This is how I see it. Lets say I use brand X, a fully syn grade maybe a 5W40. Maybe 2-3laps of Sepang, oil temp maybe at 90-100C. Oil press at 8bar at 5000 heading to 8000rpms. At the next 4-5laps later, my oil temp shows 95-104C and when i push my car from 5000 to 8000rpms again, oil press might have gone down to maybe at 6.5-7bar. With this reading I can see that the oil is starting to dilute and I know my engine will fail if I would to continue my runs. With the reading I can see that I would need a higher viscosity oil and an oil that is able to hold its viscosity level at the same time.

I cant debate much on the oil pressure between the two oils even Castrol dont have the data for it, but I can assure you that the two oils hold its viscosity and temp differently. Temperature is important to prevent breakdown of the oil, the pressure is equally important because it governs the rate at which the fluid is flowing through the engine.

This might not be totally right for you guys but I guess from what I experienced oil temp really works for me . I would go for oils that suits me or that are recommended. Not be economical and hope for its best.

With a multigrade oil, temperature greatly effects the viscosity and there is also the non-newtonian behavior in varying strain rate as well as the stability of the oil film...for example, with the TWS or high range mutigrade oil which is assumed to be highly viscous at all operating range, let say at the rod bearing site, at high rpm, varying strain rate...at this condition as Albundy pointed out, the localized temperature at the site is extremely high with high viscosity oil and at the present condition with high temperature, the viscosity of the oil and its straining strength is lowered at that site which might cause problem...well this is just a possibility that would explain why some engine with TWS also experiences bearing damage and some with normal 5W-30 oils does not...