DE day and effect on oil ? (Oh no, bad thread idea?)
08-14-2017, 11:05 AM
#16
Drifting
A bit of anecdotal info about oil and the track:
Manufacturers are using super light oils now, both to speed up cold start warm ups (emissions) and to improve fuel economy (CAFE). Both benefit the manufacturer, not us.
I have a current model Stingray Z51 (dry sump engine). The OEM oil is like 0-30 or 0-40 or something. HOWEVER: Chevy is honest enough about the car.s track capabilities as to specifically and emphatically state, in the owners manual, that's it is important to use 15-50 Mobil1 for track use. In fact, the first four oil changes (or maybe its 5?) are free, and they will use the 15-50 Mobil1 at no extra charge if you tell the service tech you're using the car on track.
So...your mileage may vary, both literally and figuratively.
Manufacturers are using super light oils now, both to speed up cold start warm ups (emissions) and to improve fuel economy (CAFE). Both benefit the manufacturer, not us.
I have a current model Stingray Z51 (dry sump engine). The OEM oil is like 0-30 or 0-40 or something. HOWEVER: Chevy is honest enough about the car.s track capabilities as to specifically and emphatically state, in the owners manual, that's it is important to use 15-50 Mobil1 for track use. In fact, the first four oil changes (or maybe its 5?) are free, and they will use the 15-50 Mobil1 at no extra charge if you tell the service tech you're using the car on track.
So...your mileage may vary, both literally and figuratively.
08-14-2017, 11:08 AM
#17
Rennlist Member
Yep. Even if its not Mobil1, which frankly isn't the best oil out there, a bit thicker oil is better for serious track work, especially in warmer weather.
08-14-2017, 11:32 AM
#18
Rennlist Member
Join Date: Nov 2008
Location: Mooresville, IN (Life Long Cheesehead)
Posts: 5,815
Likes: 0
Received 54 Likes
on
35 Posts
I also use Mobil 1, 0w40.
I have noticed that the pressure does drop after motor is run hard.
The oil pressure goes back to normal after engine cools.
This usally happens after a couple hours of driving in traffic or a couple of run sessions at the track.
I just ordered my first Blackstone test.
I have been considering switching to DT40 Gibbs oil.
But I have been using Mobil 1 in all our cars for 35 years.
Not sure which way is best route.
David
I have noticed that the pressure does drop after motor is run hard.
The oil pressure goes back to normal after engine cools.
This usally happens after a couple hours of driving in traffic or a couple of run sessions at the track.
I just ordered my first Blackstone test.
I have been considering switching to DT40 Gibbs oil.
But I have been using Mobil 1 in all our cars for 35 years.
Not sure which way is best route.
David
08-14-2017, 12:03 PM
#19
Rennlist Member
I change my oil and filter every 6 to 8 track days, Playing it safe.
I use Mobil 1 0-40, and yes, it is recommended by Porsche. Check any relatively new Owners Manual. Mobil 1 0W-40 is the oil of choice "by' Porsche.
Every 6 to 8 track days (appx 3 to 4 DE's of 2 to 3 days each).
I use Mobil 1 0-40, and yes, it is recommended by Porsche. Check any relatively new Owners Manual. Mobil 1 0W-40 is the oil of choice "by' Porsche.
Every 6 to 8 track days (appx 3 to 4 DE's of 2 to 3 days each).
snip
now that I tow I change oil every 3 events (equivalent of 9 days) and those tend to have more sessions that a usual DE. I'm about to do Tbolt with 5 25-30min session per day.
My car is air-cooled so I run 20w50 vtwin oil (non of that 0-40 stuff here). I ran redline oil for 3 events and oil analysis came very comparable to the previous ones.
now that I tow I change oil every 3 events (equivalent of 9 days) and those tend to have more sessions that a usual DE. I'm about to do Tbolt with 5 25-30min session per day.
My car is air-cooled so I run 20w50 vtwin oil (non of that 0-40 stuff here). I ran redline oil for 3 events and oil analysis came very comparable to the previous ones.
A bit of anecdotal info about oil and the track:
Manufacturers are using super light oils now, both to speed up cold start warm ups (emissions) and to improve fuel economy (CAFE). Both benefit the manufacturer, not us.
I have a current model Stingray Z51 (dry sump engine). The OEM oil is like 0-30 or 0-40 or something. HOWEVER: Chevy is honest enough about the car.s track capabilities as to specifically and emphatically state, in the owners manual, that's it is important to use 15-50 Mobil1 for track use. In fact, the first four oil changes (or maybe its 5?) are free, and they will use the 15-50 Mobil1 at no extra charge if you tell the service tech you're using the car on track.
So...your mileage may vary, both literally and figuratively.
Manufacturers are using super light oils now, both to speed up cold start warm ups (emissions) and to improve fuel economy (CAFE). Both benefit the manufacturer, not us.
I have a current model Stingray Z51 (dry sump engine). The OEM oil is like 0-30 or 0-40 or something. HOWEVER: Chevy is honest enough about the car.s track capabilities as to specifically and emphatically state, in the owners manual, that's it is important to use 15-50 Mobil1 for track use. In fact, the first four oil changes (or maybe its 5?) are free, and they will use the 15-50 Mobil1 at no extra charge if you tell the service tech you're using the car on track.
So...your mileage may vary, both literally and figuratively.
many shops and mechanics recommend all sorts of things with out a credible amount of experience. however, Redline is a good track oil.
08-14-2017, 12:30 PM
#20
Rennlist Member
Join Date: Apr 2017
Location: The Swamps of Jersey/WGI/VIR...
Posts: 6,207
Received 1,439 Likes
on
999 Posts
Recommended by porsche only means there is an agreement business wise. there is NOTHING scientific about that recommendation,, other than the oil meets min requirements.
Redline seems to perform very well under track conditions
Very true about what the manufactures are recommending these days but also dont compare the Chevy and porsche engines. very different tolerances and designs. 30weight is the standard for most small blocks, and for porsche, while 20-50 is as much as a standard. Less anecdotal evidence, is that in a fairly controlled test, (same (2) cars with mobil 1 vs same car with redline and same hot 90F day ) oil pressure light (very low pressure) came on with Mobil 1 at Buttonwillow driven fast group Time trial. With redline and Amsoil, they both had 5 bar pressure with NO variances below. That was proof enough for me.
sometimes going thicker with a blend that has viscosity breakdown at high temp, doesnt buy you very much. That Mobil 1 could have been 60 weight and it wouldnt make a difference... it basically turned to water at 250F engine temps. Go with good quality racing oils if you really want to track your car and dont want to spin a bearing.
many shops and mechanics recommend all sorts of things with out a credible amount of experience. however, Redline is a good track oil.
Redline seems to perform very well under track conditions
Very true about what the manufactures are recommending these days but also dont compare the Chevy and porsche engines. very different tolerances and designs. 30weight is the standard for most small blocks, and for porsche, while 20-50 is as much as a standard. Less anecdotal evidence, is that in a fairly controlled test, (same (2) cars with mobil 1 vs same car with redline and same hot 90F day ) oil pressure light (very low pressure) came on with Mobil 1 at Buttonwillow driven fast group Time trial. With redline and Amsoil, they both had 5 bar pressure with NO variances below. That was proof enough for me.
sometimes going thicker with a blend that has viscosity breakdown at high temp, doesnt buy you very much. That Mobil 1 could have been 60 weight and it wouldnt make a difference... it basically turned to water at 250F engine temps. Go with good quality racing oils if you really want to track your car and dont want to spin a bearing.
many shops and mechanics recommend all sorts of things with out a credible amount of experience. however, Redline is a good track oil.
Thanks VR. I was aware of the business agreement, but didn't realize that Porsche would recommend a different oil than what's best for their cars. Appreciate the info. I'm always learning something new from you. Thanks.
08-14-2017, 12:32 PM
#21
Rennlist Member
Join Date: Apr 2017
Location: The Swamps of Jersey/WGI/VIR...
Posts: 6,207
Received 1,439 Likes
on
999 Posts
Recommended by porsche only means there is an agreement business wise. there is NOTHING scientific about that recommendation,, other than the oil meets min requirements.
Redline seems to perform very well under track conditions
Very true about what the manufactures are recommending these days but also dont compare the Chevy and porsche engines. very different tolerances and designs. 30weight is the standard for most small blocks, and for porsche, while 20-50 is as much as a standard. Less anecdotal evidence, is that in a fairly controlled test, (same (2) cars with mobil 1 vs same car with redline and same hot 90F day ) oil pressure light (very low pressure) came on with Mobil 1 at Buttonwillow driven fast group Time trial. With redline and Amsoil, they both had 5 bar pressure with NO variances below. That was proof enough for me.
sometimes going thicker with a blend that has viscosity breakdown at high temp, doesnt buy you very much. That Mobil 1 could have been 60 weight and it wouldnt make a difference... it basically turned to water at 250F engine temps. Go with good quality racing oils if you really want to track your car and dont want to spin a bearing.
many shops and mechanics recommend all sorts of things with out a credible amount of experience. however, Redline is a good track oil.
Redline seems to perform very well under track conditions
Very true about what the manufactures are recommending these days but also dont compare the Chevy and porsche engines. very different tolerances and designs. 30weight is the standard for most small blocks, and for porsche, while 20-50 is as much as a standard. Less anecdotal evidence, is that in a fairly controlled test, (same (2) cars with mobil 1 vs same car with redline and same hot 90F day ) oil pressure light (very low pressure) came on with Mobil 1 at Buttonwillow driven fast group Time trial. With redline and Amsoil, they both had 5 bar pressure with NO variances below. That was proof enough for me.
sometimes going thicker with a blend that has viscosity breakdown at high temp, doesnt buy you very much. That Mobil 1 could have been 60 weight and it wouldnt make a difference... it basically turned to water at 250F engine temps. Go with good quality racing oils if you really want to track your car and dont want to spin a bearing.
many shops and mechanics recommend all sorts of things with out a credible amount of experience. however, Redline is a good track oil.
Thanks for the info. Always learning new stuff from you guys. Appreciate it.
08-14-2017, 12:37 PM
#23
Rennlist Member
)from Chevy Z51 corvette he mentioned, which i think is really odd that the car comes with 5-30 oil , but hey recommend 0-50 mobil 1 for track days.
>>>>>>>>>>>>>>>>>>>>
Viscosity Grade
Use SAE 5W-30 viscosity grade
engine oil.
snip
always select an oil of the correct
specification. See “Specification”
earlier in this section for more
information.
For track events or competitive
driving, use Mobil 1® 15W-50
engine oil. An instrument cluster
warning light will be illuminated at
high oil temperatures.
Use only engine oil licensed to the dexos1® specification of the proper SAE
viscosity grade. ACDelco dexos1 Synthetic Blend is recommended. For
track events or competitive driving, use Mobil 1® engine oil.
Use SAE 5W-30 viscosity grade
engine oil.
snip
always select an oil of the correct
specification. See “Specification”
earlier in this section for more
information.
For track events or competitive
driving, use Mobil 1® 15W-50
engine oil. An instrument cluster
warning light will be illuminated at
high oil temperatures.
Use only engine oil licensed to the dexos1® specification of the proper SAE
viscosity grade. ACDelco dexos1 Synthetic Blend is recommended. For
track events or competitive driving, use Mobil 1® engine oil.
1) Generally, you can find details on the manufacturer approvals on the oil containers or as a notice displayed by the retailer.
The current approval status is also available from your authorized Porsche dealer.
2) SAE viscosity class – Example: SAE 0W - 40 Specification 0W = Viscosity specification for low temperatures (winter).
Specification 40 = Viscosity specification for high temperatures.
3) For all temperature ranges.
4) For the temperature range above –13 °F (–25 °C)
The current approval status is also available from your authorized Porsche dealer.
2) SAE viscosity class – Example: SAE 0W - 40 Specification 0W = Viscosity specification for low temperatures (winter).
Specification 40 = Viscosity specification for high temperatures.
3) For all temperature ranges.
4) For the temperature range above –13 °F (–25 °C)
Last edited by mark kibort; 08-14-2017 at 12:55 PM.
08-14-2017, 05:18 PM
#24
Three Wheelin'
So changing topic for a moment. If tracking hard, change out OEM CATS as they will not stand up to track use over time.
08-15-2017, 12:29 AM
#27
Rennlist Member
Absolutely!! 0/40 M1 on the track sounds expensive to me. Once the motor blows that is. 20w/50 min is advised. With plenty of ZDDP. The arrangement that Porsche (especially Porsche US) has with Mobil is purely commercial.
08-15-2017, 01:15 AM
#28
RL Community Team
Rennlist Member
Rennlist Member
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.
08-15-2017, 01:49 AM
#30
Rennlist Member
Get a 944, never have to worry about changing, just keep adding.