Oil Brand Type / Weight being used/preferred
#16
Burning Brakes
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I tend to lean more towards the 0W40 for slightly better start up protection, which is where the bulk of wear occurs especially for a DD. Found this on the internets. Its about MB but the principle should apply.
http://www.mobiloil.com/USA-English/...edes-Benz.aspx
http://www.mobiloil.com/USA-English/...edes-Benz.aspx
#17
Drifting
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12 track days on Mobil 0W40? Wow, that's asking a lot, Brad. Cut that in 1/2. And use a 5W40 oil. And one of the oils I referenced above.
#19
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Not surprisingly there's a huuuuuuge thread on m3post about oil and the thread started about premature bearing wear. A lot of people speculate it's because the spec 10w60 castrol tws is too heavy at startup and the oil has hard time getting by tight tolerances etc etc
Anyway, the reason I reference this, one of the posters is an engine builder for Hendrick racing and this led to bearing tolerances compared oils - then referenced better choices such as Mobil 1 0w40 among others. There's also tons of data on bobistheoilguy. Basically the euro spec 0w40 is significantly better than "regular" Mobil 1? I think he also referenced motul and a shell synthetic diesel oil (I don't remember).
I think lexvan is right, it's best to have it sampled and go off that, especially since we can't even see our oil until it's drained! He never mentioned joe gibbs oil but that's probably because Gibbs is a competitor to Hendricks.
Anyway, the reason I reference this, one of the posters is an engine builder for Hendrick racing and this led to bearing tolerances compared oils - then referenced better choices such as Mobil 1 0w40 among others. There's also tons of data on bobistheoilguy. Basically the euro spec 0w40 is significantly better than "regular" Mobil 1? I think he also referenced motul and a shell synthetic diesel oil (I don't remember).
I think lexvan is right, it's best to have it sampled and go off that, especially since we can't even see our oil until it's drained! He never mentioned joe gibbs oil but that's probably because Gibbs is a competitor to Hendricks.
#20
Drifting
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Excuse my ignorance, but it don't know what UOA and TBN stands for. (EDIT: I just went to Blackstone labs and learned what the acronyms stand for. But it sure is confusing!)
Last edited by BradB; 07-02-2014 at 12:48 AM.
#21
Three Wheelin'
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For the record its not 0F but C as 0F equates to -17.8c.
0 - 40 should be better for engine as it reduces wear at cold starts and 5-50 should be better for oil as it reduces degradation (of oil) at high temp. So if you live in a cold climate and aren't tracking the car then 0-40 but on the other hand if you're pushing the car or in California then 5-50. Either way differences are not so much that would concern me.
In the old non synthetic days we used to switch oils between summer & winter.
0 - 40 should be better for engine as it reduces wear at cold starts and 5-50 should be better for oil as it reduces degradation (of oil) at high temp. So if you live in a cold climate and aren't tracking the car then 0-40 but on the other hand if you're pushing the car or in California then 5-50. Either way differences are not so much that would concern me.
In the old non synthetic days we used to switch oils between summer & winter.
#22
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With the CPO warranty I'm not worried about stuff breaking but I do like taking care of my equipment.
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#23
Race Director
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I would do one of my oil changes mid summer to split up the number of track days on the same oil. Gee, I thought that was doing pretty good. ![Frown](https://rennlist.com/forums/images/smilies/frown.gif)
Excuse my ignorance, but it don't know what UOA and TBN stands for. (EDIT: I just went to Blackstone labs and learned what the acronyms stand for. But it sure is confusing!)
![Frown](https://rennlist.com/forums/images/smilies/frown.gif)
Excuse my ignorance, but it don't know what UOA and TBN stands for. (EDIT: I just went to Blackstone labs and learned what the acronyms stand for. But it sure is confusing!)
#25
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I tend to lean more towards the 0W40 for slightly better start up protection, which is where the bulk of wear occurs especially for a DD. Found this on the internets. Its about MB but the principle should apply.
http://www.mobiloil.com/USA-English/...edes-Benz.aspx
http://www.mobiloil.com/USA-English/...edes-Benz.aspx
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Great oil. I plan to switch to this oil at my next oil change (Sept.). Ran it in other Porsches. Always had excellent UOA's. Hard to find retail, actually impossible. But I have an account with the local Mobil distributor. Can buy a case (6) for about $46 and local pick-up. Not bad in the life of boutique oils.
#28
#30
Drifting
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Thanks guys, I found those sources. I think I will change my oil with the 0w40 I have on the shelf, then run a Blackstone test, and see how it reads. Perhaps next time I'll get the 5w50.
I wonder if 15w50 would work for the summer months? I run that in my 993 and it is readily available and cheap.
In the end I'll run what's best. Too much of an investment to squabble over pennies.
I wonder if 15w50 would work for the summer months? I run that in my 993 and it is readily available and cheap.
In the end I'll run what's best. Too much of an investment to squabble over pennies.