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1974 911 w/ 83 SC engine
Join Date: Aug 2009
Location: Austin, Texas
Posts: 602
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Switching to Brad Penn causing my bad leak?
I just switched from Royal Purple full synthetic 20/50 to Brad Penn last Sunday, and now my car is leaking oil like I've never seen. I have one of the late model 83 SC engines with a 5R case, where there is no sump plate and just a long seam down the middle. It's leaking at the lowest point of the seam, to the point where every time I look underneath the car there's a drop of oil ready to fall. There are routinely stains on the ground about the size of a drink coaster now as well.
Anyone know what could be going on here? I've always heard of full synthetic causing leaks, but I didn't have any noticeable leaking with the Royal Purple--and certainly not like this. I know everyone here loves Brad Penn, but I can't reap any benefits of it if I can't even keep it in my car. Thanks for any advice. |
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05-06-2010, 09:37 PM
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FWIW my understanding isn't that synthetics 'cause' leaks, but they do tend to creep through smaller gaps than dino's will. maybe a change back to a high grade dino?
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05-06-2010, 09:48 PM
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Join Date: Mar 2010
Location: SF Bay Area, CA
Posts: 82
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Is the Brad Penn oil also 20/50? Changing weight/viscosity may also result in "leaks" - as in, you may already have had a compromised part or fuel line, and the new oil leaks through them when the old oil didn't.
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1984 Carrera 3.2L Coupe, Guards Red |
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05-06-2010, 11:03 PM
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Strangely, I switched from Mobil1 to Brad Penn and noticed a definite increase in leaks. I have since switched to Valvoline Racing due to the difficulty in getting Brad Penn and the leaks have subsided. Anecdotal for sure, but that's what I experienced.
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Mike 1976 Euro 911 3.2 w/10.3 compression & SSIs 22/29 torsions, 22/22 adjustable sways, Carrera brakes |
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05-07-2010, 03:17 AM
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Join Date: Nov 2006
Location: Charlotte, NC
Posts: 1,514
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Please do not post anymore negative messages about the almighty "Brad Penn" here... since most people here worship this oil all of these leak issues must be YOU...
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JP '76 911s Ice Green Metallic bone stock |
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05-07-2010, 03:46 AM
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Join Date: Oct 2002
Location: St. Louis region
Posts: 3,147
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Not to mention the smoking issue.
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Deceased: Black '88 Carrera Coupe, Steve Wong and Russell Berry chips, Dansk premuffler, custom MK GT3-style muffler, Magnecores. Al Reed 7 & 8 X 16 Fuchs. Full Elephant Racing suspension, 21/28 T-bars, Turbo tierods, bump steer kit, Bilstein Sports, BK strut bar. Ruf bumpers, 935 mirrors, Carrera 3.0 tail, DasSport bar. '11 BMW 328iX, '18 Nissan Frontier 4X4, '92 Acura NSX. |
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05-07-2010, 06:26 AM
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i keep hearing that when people switch to another oil, they observe increased leaks...appears to be especially true of 74-89. i have a friend who recently switched from Castrol GTX (high mileage) to Valvoline 1 for increased zinc protection and got increased leakage to boot!!!!
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78 930 84 R5 T2 04 Suby Outback "it's a mystery, wrapped in a riddle, inside an enigma" Winston Churchill. |
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05-07-2010, 06:39 AM
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Join Date: Jan 2009
Location: Marietta, Ga (Atlanta)
Posts: 2,970
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I too switched from Castrol GTX to Brad Penn on my 3.6 transplant motor and found a leak! However, the leak was coming out of the innards of the engine mounted oil cooler(yes I added one to the 964 3.6), but no other leaks. (by the way, have checked, and leak is definitely not from the thermostat or oil pressure sender but the cooling channels in the cooler)) I obviously had an existing pinhole in the cooler, and when I put Brad Penn in it, the Brad Penn did such a good job of cleaning out any debris in the engine, that it exposed a pin hole in the cooler that had been plugged by gunk! The cooler only drips a drop about every 8 or 10 minutes while the engine is idling. I have acquired a new cooler and will replace it soon, but I will be staying with Brad Penn, as it sure has demonstrated it's cleaning ability!
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'80SC Widebody 3.6 transplant Anthracite "The Rocket" Long gone but still miss them all: '77 911 Targa, '72 BMW 3.0CS Coupe(finest car I ever had!) '71 911T Coupe White, '70 911T Coupe Blue '68 911 Coupe Orange, '68 911L Soft Window Targa |
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05-07-2010, 07:23 AM
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Checked out
Join Date: Jun 2009
Location: On a beach
Posts: 10,127
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05-07-2010, 08:23 AM
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Registered
Join Date: Jan 2009
Location: Marietta, Ga (Atlanta)
Posts: 2,970
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Quote:
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'80SC Widebody 3.6 transplant Anthracite "The Rocket" Long gone but still miss them all: '77 911 Targa, '72 BMW 3.0CS Coupe(finest car I ever had!) '71 911T Coupe White, '70 911T Coupe Blue '68 911 Coupe Orange, '68 911L Soft Window Targa |
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05-07-2010, 08:29 AM
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Registered
Join Date: Jan 2009
Location: Marietta, Ga (Atlanta)
Posts: 2,970
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Quote:
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'80SC Widebody 3.6 transplant Anthracite "The Rocket" Long gone but still miss them all: '77 911 Targa, '72 BMW 3.0CS Coupe(finest car I ever had!) '71 911T Coupe White, '70 911T Coupe Blue '68 911 Coupe Orange, '68 911L Soft Window Targa |
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05-07-2010, 08:37 AM
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LOL. I find it hilarous how people blindly follow the Brad Penn gospel and how everyone that has any issues after switching is doing something incorrect....
I use Kendall GT1 20w50. no issues. Quote:
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83 SC Targa -- 3.2SS, GT2-108 Dougherty Cams, 9.5:1 JE Pistons, Supertec Studs, PMO ITB's, MS2 EFI, SSI's, Recurved Dizzy, MSD, Backdated Dansk Sport Stainless 2 in 1 out, Elephant Polybronze, Turbo Tie Rods, Bilstein HD's, Hollow 21-27 TBs, Optima Redtop 34R, Griffiths-ZIMS AC, Seine Shifter, Elephant Racing Oil Cooling. |
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05-07-2010, 10:20 AM
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Tried BP 20W50, no more leaks but car ran 20% higher temp than it did with M1. Tried Redline Racing 50W, back to lower temps. Final choice was M1 20W50 VTwin, low temps, high ZDDP, good detergent level.
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Gary R. |
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05-07-2010, 10:27 AM
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Join Date: Oct 2002
Location: St. Louis region
Posts: 3,147
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As long as we're bashing BP: I also noticed slower cranking speeds and for longer; same 20/50 as the M1 V-Twin I was running, but thicker still. Always wondered how well it was circulating at startup.
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Deceased: Black '88 Carrera Coupe, Steve Wong and Russell Berry chips, Dansk premuffler, custom MK GT3-style muffler, Magnecores. Al Reed 7 & 8 X 16 Fuchs. Full Elephant Racing suspension, 21/28 T-bars, Turbo tierods, bump steer kit, Bilstein Sports, BK strut bar. Ruf bumpers, 935 mirrors, Carrera 3.0 tail, DasSport bar. '11 BMW 328iX, '18 Nissan Frontier 4X4, '92 Acura NSX. |
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05-07-2010, 10:37 AM
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Registered
Join Date: Jan 2009
Location: Marietta, Ga (Atlanta)
Posts: 2,970
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Quote:
Kendall is now made by Conoco/Phillips
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'80SC Widebody 3.6 transplant Anthracite "The Rocket" Long gone but still miss them all: '77 911 Targa, '72 BMW 3.0CS Coupe(finest car I ever had!) '71 911T Coupe White, '70 911T Coupe Blue '68 911 Coupe Orange, '68 911L Soft Window Targa Last edited by uwanna; 05-07-2010 at 01:24 PM.. |
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05-07-2010, 11:05 AM
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muck-raker
Join Date: Jan 2009
Location: Coastal PNW
Posts: 3,059
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hey Brad, where are you getting that Kendall GT1????
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STONE '88 Cabriolet, using EP Slick 20w50 partial synthetic Snake Oil...just as Rommel intended.  Deny Everything; Admit Nothing; and Always Make Counter-accusations 
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05-07-2010, 01:01 PM
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It is ironic... but the Conoco made GT1 is great oil... it has all the good stuff... ill leave it at that...
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83 SC Targa -- 3.2SS, GT2-108 Dougherty Cams, 9.5:1 JE Pistons, Supertec Studs, PMO ITB's, MS2 EFI, SSI's, Recurved Dizzy, MSD, Backdated Dansk Sport Stainless 2 in 1 out, Elephant Polybronze, Turbo Tie Rods, Bilstein HD's, Hollow 21-27 TBs, Optima Redtop 34R, Griffiths-ZIMS AC, Seine Shifter, Elephant Racing Oil Cooling. Last edited by brads911sc; 05-07-2010 at 02:57 PM.. |
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05-07-2010, 02:51 PM
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Jones Oil. Right off I45N.
Quote:
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83 SC Targa -- 3.2SS, GT2-108 Dougherty Cams, 9.5:1 JE Pistons, Supertec Studs, PMO ITB's, MS2 EFI, SSI's, Recurved Dizzy, MSD, Backdated Dansk Sport Stainless 2 in 1 out, Elephant Polybronze, Turbo Tie Rods, Bilstein HD's, Hollow 21-27 TBs, Optima Redtop 34R, Griffiths-ZIMS AC, Seine Shifter, Elephant Racing Oil Cooling. |
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05-07-2010, 02:52 PM
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No one is bashing BP. There are 10 or so GREAT oils, all with the right stuff... BP is a great oil.. no one has said its not... But there is more to oil than ZDDP. If someone runs higher temps or has leaks that is also a factor... People post their experiences... its not all great with BP... No one is claiming that they have leaks or increased temps with conoco made GT1. period. and it has the right amount of the good stuff. period. and its endorsed by people like Peter Z.
people should stop drinking the koolaide and make their own decision... Quote:
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83 SC Targa -- 3.2SS, GT2-108 Dougherty Cams, 9.5:1 JE Pistons, Supertec Studs, PMO ITB's, MS2 EFI, SSI's, Recurved Dizzy, MSD, Backdated Dansk Sport Stainless 2 in 1 out, Elephant Polybronze, Turbo Tie Rods, Bilstein HD's, Hollow 21-27 TBs, Optima Redtop 34R, Griffiths-ZIMS AC, Seine Shifter, Elephant Racing Oil Cooling. |
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05-07-2010, 02:57 PM
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1974 911 w/ 83 SC engine
Join Date: Aug 2009
Location: Austin, Texas
Posts: 602
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I am just going to replace the Brad Penn that leaks out with the new Mobil 1 0w50 race oil that's suppose to come out this month. High ZDDP, made for flat tappets, 0w cold flow, it looks like a good choice.
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05-07-2010, 05:03 PM
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912 SWB
1967 porch 912
1976 Porsche 911
Blackbird
2005 Porsche 997S 3.8L
