M20 2.5 with a million miles
I worked for Mobil when they ran this test in America (I wasn't involved on the test). I used to visit the laboratories in Essex where they did a lot of automotive tests and they were very thorough. Before and after measurements were always taken at the same room (laboratory) temperature after the components had stabilized so there was no fiddling of figures.
Needless to say, I've used Mobil 1 virtually from the day it was launched - I did get a good discount though.
Needless to say, I've used Mobil 1 virtually from the day it was launched - I did get a good discount though.
The point I wanted to make is that the engine is good and not only the oil
There are a lot of diskussions about using non mineral oil at the M20.
After reading them all I went for the original mineral 15W40 BMW advises for the m20. I hope this choise was a good one, after a million miles I will know
There are a lot of diskussions about using non mineral oil at the M20.
After reading them all I went for the original mineral 15W40 BMW advises for the m20. I hope this choise was a good one, after a million miles I will know
Last edited by pierrez1 on Sun 17 Jan, 2010 11:15, edited 1 time in total.
can anyone tell me the low down on "oil" - I`m not mechanically minded at all - I`m totally confused which oil should be used? I have a Z3 2.2 Roadster, it has always been serviced by the dealership and so I presume they use the appropriate oil, and more importantly the best oil? Is this the case or should I be making a request for a specific oil to be used?
I'm sorry but I think you might find out before a million miles !pierrez1 wrote:The point I wanted to make is that the engine is good and not only the oil
There are a lot of diskussions about using non mineral oil at the M20.
After reading them all I went for the original mineral 15W40 BMW advises for the m20. I hope this choise was a good one, after a million miles I will know
When the test was run, synthetic oil was relatively new and Mobil were trying to convince people that it was worth the extra cost. What impressed me at the time was the virtual absence of sludge, tar, varnish etc. Mineral oil is something that was found in the ground and adjusted with additives for use in engines. Synthetic oil is an engineered molecule that can withstand greater extremes of temperature and pressure and requires fewer additives so there is less decomposition.
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That's my kind of testing. The engine would not even survive at 10 % of the millage.horke wrote:1Mio Miles with a constant speed, no acceleration, no bumpy road etc.
That's not a real test.
I would be interested how this enigine would look like on 50% of the distance - but driven on the nordschleife.
Nor would the rest of the car!Holland Harry wrote:That's my kind of testing. The engine would not even survive at 10 % of the millage.horke wrote:1Mio Miles with a constant speed, no acceleration, no bumpy road etc.
That's not a real test.
I would be interested how this enigine would look like on 50% of the distance - but driven on the nordschleife.
Yes I think any modern engine that doesn't have some kind of design defect would last that long. The main cause of engine wear is starting from cold and the warm-up cycle, so this test wasn't "fair" in that it was started very few times in that 1million miles? so almost always at perfect running temp so very litle wear occurs. It's also not under any load, unless those rollers were loaded up to give the engine some work to do.
Even under normal driving, with religious care during warm-up and regular oil changes they would last a lot longer than anyone would excpet but it's difficult to compare or expect this when the engine has had several owners, maybe some abuse and irregular servicing and usage.
Even under normal driving, with religious care during warm-up and regular oil changes they would last a lot longer than anyone would excpet but it's difficult to compare or expect this when the engine has had several owners, maybe some abuse and irregular servicing and usage.