DE day and effect on oil ? (Oh no, bad thread idea?)
08-15-2017, 03:41 PM
#31
Rennlist Member
There are a lot of variables to consider if you track an M96 motor that affect whether it grenades. The x51 baffle helps and with "29 modes of failure" with this engine, do all you can! 
Based on my internet musings, if you are sticking with A40 approved oils, running fresh (meaning the viscosity index improvers have not broken down over time to make the wide 5 to 50 viscosity spread a negative attribute), 5w-50 M1 appears to be the best option to run until someone builds us a nice M96/97 dry sump system that eliminates the sloshing and potential to suck air. With that said, for the past 8 years my j-class 02 996 PCA/POC club race car has liked its M1 0w-40 that is changed every several race weekends. By "liked" I mean it hasn't grenaded yet.
Based on my internet musings, if you are sticking with A40 approved oils, running fresh (meaning the viscosity index improvers have not broken down over time to make the wide 5 to 50 viscosity spread a negative attribute), 5w-50 M1 appears to be the best option to run until someone builds us a nice M96/97 dry sump system that eliminates the sloshing and potential to suck air. With that said, for the past 8 years my j-class 02 996 PCA/POC club race car has liked its M1 0w-40 that is changed every several race weekends. By "liked" I mean it hasn't grenaded yet.
I have been on the fence about doing one, if starvation from the filter flow was there, why did Porsche not address it?
08-15-2017, 11:34 PM
#32
Rennlist Member
What's confusing here is throwing around 'days'. Days are irrelevant. Hours are what need to be measured.
A PCA DE may only have 4 X 20 minute sessions each day. Factoring in a warm up and cool down lap, and accounting for occasional track suspension - what is that, an hour of hard use per day?
I change my oil at 12 hours of track use, plus any ancillary driving. Based on testing, seems to be fine. Your testing of course, may vary.
Cheers
Matt
A PCA DE may only have 4 X 20 minute sessions each day. Factoring in a warm up and cool down lap, and accounting for occasional track suspension - what is that, an hour of hard use per day?
I change my oil at 12 hours of track use, plus any ancillary driving. Based on testing, seems to be fine. Your testing of course, may vary.
Cheers
Matt
08-15-2017, 11:46 PM
#33
Drifting
What's confusing here is throwing around 'days'. Days are irrelevant. Hours are what need to be measured.
A PCA DE may only have 4 X 20 minute sessions each day. Factoring in a warm up and cool down lap, and accounting for occasional track suspension - what is that, an hour of hard use per day?
I change my oil at 12 hours of track use, plus any ancillary driving. Based on testing, seems to be fine. Your testing of course, may vary.
Cheers
Matt
A PCA DE may only have 4 X 20 minute sessions each day. Factoring in a warm up and cool down lap, and accounting for occasional track suspension - what is that, an hour of hard use per day?
I change my oil at 12 hours of track use, plus any ancillary driving. Based on testing, seems to be fine. Your testing of course, may vary.
Cheers
Matt
So 1 day 4-5 20-25 min sessions (unless Cups and Saucers event
) 1.5-2 hours per day. 3 events or 9 days days 14-18 hours...
08-16-2017, 09:46 AM
#34
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There is no starvation related to the stock filter. The reason people go to the spin on adaptor is because the stock housing allows unfiltered oil to flow thru the motor at start up. The spin filter does not.
08-16-2017, 02:49 PM
#35
Rennlist Member
08-16-2017, 04:13 PM
#36
Rennlist Member
That is one of the reasons why I am on fence.
Is the flow of unfiltered oil only at startup or some reference also at high rpm.
The other reason is the consistent complaint of adapter comes loose while removing filter.
Has anyone noticed any quality difference in brands?
08-16-2017, 09:35 PM
#37
I don't drive a Porsche but I've had great luck changing my oil out every other event--never an oil-related engine problem. Have always used the oil recommended by the manufacturer in the owner's manual as well as the factory filter.
Though it's not really a performance-oriented site, bobistheoilguy.com will tell you all you will ever need to know about oil. These guys are truly oil nerds
Gary
Though it's not really a performance-oriented site, bobistheoilguy.com will tell you all you will ever need to know about oil. These guys are truly oil nerds
Gary
08-17-2017, 11:30 AM
#38
Race Director
I came across this blog from an engineering at a independent test lab. This has more info that I can comprehend this morning...but what I did learn is:
Higher levels of Zinc ZDDP does not mean more engine protection
Thinner oils protect better than thick oils
Today's tight tolerance engines do not need thick oils
Mobil 1 0w40 scored better (higher psi before wear) than Mobil 1 5w50
Oil weights that are not in Porsche recommendations have higher protection
https://540ratblog.wordpress.com/
Higher levels of Zinc ZDDP does not mean more engine protection
Thinner oils protect better than thick oils
Today's tight tolerance engines do not need thick oils
Mobil 1 0w40 scored better (higher psi before wear) than Mobil 1 5w50
Oil weights that are not in Porsche recommendations have higher protection
https://540ratblog.wordpress.com/
08-17-2017, 03:14 PM
#39
I came across this blog from an engineering at a independent test lab. This has more info that I can comprehend this morning...but what I did learn is:
Higher levels of Zinc ZDDP does not mean more engine protection
Thinner oils protect better than thick oils
Today's tight tolerance engines do not need thick oils
Mobil 1 0w40 scored better (higher psi before wear) than Mobil 1 5w50
Oil weights that are not in Porsche recommendations have higher protection
https://540ratblog.wordpress.com/
Higher levels of Zinc ZDDP does not mean more engine protection
Thinner oils protect better than thick oils
Today's tight tolerance engines do not need thick oils
Mobil 1 0w40 scored better (higher psi before wear) than Mobil 1 5w50
Oil weights that are not in Porsche recommendations have higher protection
https://540ratblog.wordpress.com/
08-17-2017, 06:17 PM
#40
Race Director
LOL ^^^ Yep!
I've always used Mobil 1 0w40 or Motul 5w40 in my 997 cars with no issues. I have a case plus on Mobil 1 5w50 in my garage now that is listed in my owners manual as approved oil weight.
I will put that oil in in a few weekends from now.
I've always used Mobil 1 0w40 or Motul 5w40 in my 997 cars with no issues. I have a case plus on Mobil 1 5w50 in my garage now that is listed in my owners manual as approved oil weight.
I will put that oil in in a few weekends from now.
08-17-2017, 07:35 PM
#41
Rennlist Member
While the brain trust is engaged here may i ask this: I run Gibbs XP6 racing oil in my 3.4 liter twin plug SS racing motor in an IROC clone chassis, Carbs, big cams and MSD ignition.. makes about 295 at wheels thru a race G50 box. Alomst all 30 min sprints with occasional 1 hour enduros. Change oil and all filters after 3 events . Sound like enough? This Xp6 is expensive! just hoping getting my $$s worth Thsnks Frank
08-17-2017, 07:52 PM
#42
Rennlist Member
IMO yeah that's enough
08-18-2017, 01:13 AM
#43
Rennlist Member
I came across this blog from an engineering at a independent test lab. This has more info that I can comprehend this morning...but what I did learn is:
Higher levels of Zinc ZDDP does not mean more engine protection
Thinner oils protect better than thick oils
Today's tight tolerance engines do not need thick oils
Mobil 1 0w40 scored better (higher psi before wear) than Mobil 1 5w50
Oil weights that are not in Porsche recommendations have higher protection
https://540ratblog.wordpress.com/
Higher levels of Zinc ZDDP does not mean more engine protection
Thinner oils protect better than thick oils
Today's tight tolerance engines do not need thick oils
Mobil 1 0w40 scored better (higher psi before wear) than Mobil 1 5w50
Oil weights that are not in Porsche recommendations have higher protection
https://540ratblog.wordpress.com/
08-19-2017, 12:16 PM
#44
Three Wheelin'
I came across this blog from an engineering at a independent test lab. This has more info that I can comprehend this morning...but what I did learn is:
Higher levels of Zinc ZDDP does not mean more engine protection
Thinner oils protect better than thick oils
Today's tight tolerance engines do not need thick oils
Mobil 1 0w40 scored better (higher psi before wear) than Mobil 1 5w50
Oil weights that are not in Porsche recommendations have higher protection
https://540ratblog.wordpress.com/
Higher levels of Zinc ZDDP does not mean more engine protection
Thinner oils protect better than thick oils
Today's tight tolerance engines do not need thick oils
Mobil 1 0w40 scored better (higher psi before wear) than Mobil 1 5w50
Oil weights that are not in Porsche recommendations have higher protection
https://540ratblog.wordpress.com/
I ran across that blog a while ago and read with some interest. Does seem to be independent, but I also found some reports that discredited the testing method the tester uses as not relevant for measuring the kind of abuse that engines inflict on oil
It would be nice to see some good, independent testing of oils that we can use in deciding which to use.
