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Helmsy's Avatar
 
Join Date: May 2008
Location: South Australia
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A thicker oil -maybe dino and/or 20w50 may help with tiny leaks. Sonetimes thinner oil will produce leaks that thicker oils don't show.

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Ben
'85 930 - Black on Black
'95 993 Turbo - Silver
Old 06-12-2011, 05:31 AM
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Well, that's not entirely accurate. Synthetic oils will remove sludge deposits that build up over time with dino oil. If you split the cases of engines that have used synthetic versus a dino engine, the differences are remarkable. Syn-oil cases virtually have no varnish/sludge deposits in the case....they look remarkably clean.
Some have seen seepage of oil when switching to syn, others have not. Just beware.
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Dave
'85 930 Factory Special Wishes Flachbau
Werk I Zuffenhausen 3.3l/330BHP Engine with Sonderwunsch Cams, FabSpeed Headers, Kokeln IC, Twin Plugged Electromotive Crankfire, Tial Wastegate(0.8 Bar), K27 Hybrid Turbo, Ruf Twin-tip Muffler, Fikse FM-5's 8&10x17, 8:41 R&P

Last edited by WERK I; 06-19-2011 at 11:38 AM..
Old 06-12-2011, 11:48 AM
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AMSOIL 20/50, every 5K. Started with 34k now at 110K. Oil analysis about every third oil change, and all analysis have come back excellent. I do alot of highway driving, hence the 5k intervals. No leaks to date that hit the ground!
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Tim
1986 930
Gone:71,2,4 914's, 70T, 71T(RS),77S
Old 06-12-2011, 05:47 PM
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Gulf 15-50 Ester based racing oil on mine now. Had lots of smoke on the cabin from the heat exchangers yesterday but it does not drip on the floor?

Cracked heat exchangers and just the oil burning out without the cooling effect of the fan? I have blocked the fan on the smoking side so now the exchangers get extra hot (I did remove the ducts now but curious what it is). Does not smoke from exhaust at least from mirror view.

Last edited by smurfbus; 06-12-2011 at 09:58 PM..
Old 06-12-2011, 09:38 PM
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Quote:
50%/50% blend of Mobil 1 20-50W/Mobil 1 V-twin 20-50W
I've been running this combo in my mostly track 930 for a couple of years now. On the shelf locally, and I've had excellent results.

John
Old 06-12-2011, 09:47 PM
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Quote:
Originally Posted by smurfbus View Post
Gulf 15-50 Ester based racing oil on mine now. Had lots of smoke on the cabin from the heat exchangers yesterday but it does not drip on the floor?
I used AMSOIL 20/50 racing for one or two oil changes, then talked with one of the AMSOIL engineers, and he for a street engine I should not use "their" racing oil as it did not have the detergents. Have no idea if this applies to other brands.
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Tim
1986 930
Gone:71,2,4 914's, 70T, 71T(RS),77S
Old 06-13-2011, 06:36 AM
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I asked about the zink levels and the oil specialist said over 1300.
Old 06-13-2011, 11:21 AM
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I've been using Liqui Moly in my 1985 930.

They seem to have 2 full synthetic oils that would work for our cars:

Synthoil Hig Tech 5W-40 with Zn above 1100 ppm and P above 1000 ppm

and

MoS2 Leichtlauf 10W-40 (which they recommend for a 930) with Zn above 1500 ppm and P above 1350 ppm

I am not sure if anybody else uses this oil but my car came with it in the engine...

David
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David
1985 Black 930, K27 7006, Garretson Intercooler, Adj boost, TB: 23 - 31mm, bielstein sport shocks, ER polybronze bushings front and rear, ER monoball joints front and rear with offset camber plates, 935 X triangulated strut brace, raised spindles, racing bump steer kit
1981 Black 911sc (sold)
Old 06-13-2011, 01:47 PM
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thanks guys , i think i will try the vr1 route and see how she goes .Just out of curiosity how many litres at full change do you think i will need? (uk litres)
Old 06-18-2011, 05:59 PM
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I've been told not to use ordinary Mobil 1 unless it's old-stock. The base stock for this oil was changed years ago and this is why I'm currently using Mobil 1 Turbo Diesel Truck in my 87 930. I inspect my cam faces each winter and they look the same each year.
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HFR_Racer

'87 930, 3.3 liter, K27 hybrid, Kokeln IC, Andial, B&B, Borla, 17" Supercups.
Old 06-19-2011, 04:32 AM
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A bit of dino sludge in my case after a few years is nothing compared to this ...



This is coked oil from the turbo. I did nothing else but switch from synthetic Shell Helix Ultra 5W-40 to non-synthetic Penrite HPR30 20W-60 to cure it.
As far as I'm concerned, synthetic oils aren't worth the risk.
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Bill
1988 Carrera - 3.6 engine (with ITBs, COPs, MS3X) and a whole set of turbo body panels waiting in the attic.
Day job ... www.sspowdercoat.com.au
Memories: '68 912, '72 911T, '80 911SC, '84 911, '85 930, '86 930, '87 911
Old 06-19-2011, 05:07 AM
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That is nasty... I was told that synthetic was supposed to cure the oil coking in the turbo problem...
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David
1985 Black 930, K27 7006, Garretson Intercooler, Adj boost, TB: 23 - 31mm, bielstein sport shocks, ER polybronze bushings front and rear, ER monoball joints front and rear with offset camber plates, 935 X triangulated strut brace, raised spindles, racing bump steer kit
1981 Black 911sc (sold)
Old 06-19-2011, 10:38 AM
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for the guys using the valvoline vr1 are you using the synthetic?
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84 930 Slant
15 Sonata 2.0T
08 Ram 1500
15 Ram Eco Diesel
Old 06-22-2011, 06:03 AM
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Quote:
Originally Posted by j930 View Post
for the guys using the valvoline vr1 are you using the synthetic?
nein........
Old 06-22-2011, 08:44 AM
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danke
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84 930 Slant
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08 Ram 1500
15 Ram Eco Diesel
Old 06-22-2011, 09:45 AM
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McClure stations are new to my area (Indiana). They stock Brad Penn. Have 20W-50 Premium on the shelf along with other grades. Even 50W for the full on racer.
Old 06-22-2011, 09:52 AM
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I was using brad penn and had a few leaks show up that were not there prior, I think i am going to try the vr1 and not the synthetic version. I am currently in the process of pulling the engine and replacing every seal and would like to get a leak free machine.

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84 930 Slant
15 Sonata 2.0T
08 Ram 1500
15 Ram Eco Diesel
Old 06-22-2011, 03:16 PM
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