Pelican Parts
Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   Pelican Parts Forums > Porsche Forums > Porsche 924/944/968 Technical Forum


Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
Registered User
 
MrPants's Avatar
 
Join Date: Mar 2003
Location: dfw, texas
Posts: 1,137
synthetic vs. dino... again

is there any reason aside from cost NOT to use synthetic? ive heard its 'thinner' than dino oil but cant that problem be solved by using a higher weight oil?
anyone had first hand negative experience with either?
__________________
84 944 Non Alcoholic
Old 10-03-2003, 12:03 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
Custom User Title
 
rammstein's Avatar
 
Join Date: Oct 2002
Location: Miami
Posts: 4,295
If you are currently using Dino and have leaks, synthetic will REALLY leak.
Old 10-03-2003, 05:04 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
Registered User
 
pearldrum's Avatar
 
Join Date: Jun 2001
Location: Louisville KY, Murfreesboro TN
Posts: 975
Send a message via AIM to pearldrum
I switched to synthetic and had an oil leak before with dino. It didn't seem to get much worse if it did, maybe it will soon...
__________________
'83 arctic silver 944 n/a
Power steering? who needs it!
Old 10-03-2003, 05:09 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #3 (permalink)
Writer/Teacher
 
CJFusco's Avatar
 
Join Date: Mar 2001
Location: Wandering Connecticut
Posts: 9,288
Garage
Send a message via AIM to CJFusco
a quote from my mechanic: "Synthetic is great, but it always seems to figure out a way to leak."

Sneaky synthetic oil.
__________________
Current Stable: Black 07 Porsche Cayman S: FabSpeed Maxflo Exhaust; VividRacing ECU Tune; IPD Competition Plenum; 997GT3 Throttle Body; De-Snork'd.2011 Acura MDX. 2008 Mazda 3. Gone But Not Forgotten:Garnet Red 86 Porsche 951("The Purple Pig"). Silver 09 Mini Cooper S ("Mighty Mouse"). Alpine White 83 Porsche 944 ("Alpine Wolf"). Guards Red 84 Porsche 944. Green 97 Volvo 850 Wagon ("The Viridian Falcon").
Old 10-03-2003, 05:42 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #4 (permalink)
Registered User
 
BlueQuestTSi's Avatar
 
Join Date: Jun 2003
Posts: 396
Quote:
Originally posted by CJFusco
a quote from my mechanic: "Synthetic is great, but it always seems to figure out a way to leak."

Sneaky synthetic oil.
Synthetic usually has better cleaning agents, and doesn't gum up like dyno oil does. Dyno oil may gum up seals, thus preventing leaks. So, if you have a small oil leak with dyno oil, the oil itself could be coking up the leak somewhat and prevent it from being a massive leak. Throw in Synthetic, and it starts to clean out the gummed up dyno oil, and will eventually cause a drip to become a gusher(so-to-speak).

I don't recommend changing a high mileage car to synthetic due to leaking capabilities. Always switch to synthetics on a low mileage engine, it's best to make the switch just after a new engine break in.
__________________
Jack
86 Red 951 - Turbo Twists, otherwise stock for now
83 Black 944 w/86 951 front end - still down and out, but coming back slowly.
02 Altima SE 3.5 - grocery go-getter
00 Yellow Ducati Monster 900i.e. 88 Chrysler Conquest TSi
Old 10-03-2003, 08:17 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #5 (permalink)
Registered User
 
scheistermeiste's Avatar
 
Join Date: Jul 2003
Location: Cincinnati, OH
Posts: 1,025
Send a message via AIM to scheistermeiste Send a message via Yahoo to scheistermeiste
would one have a problem switching from synthetic to dino?
__________________
Special Edition 924S 1988 <- SOLD!

Asking if you should replace that timing belt is like asking if you should re-use a condom that may have in hole in it with a hooker.
Old 10-03-2003, 09:01 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #6 (permalink)
Registered User
 
Join Date: Sep 2002
Location: N. California
Posts: 341
If its the same grade I can't see it leaking more. Search out Mobil 1 15/50, the heaviest grade they make - I put it in a 115K mile S2 with no problems.

Synthetic is a much, much better oil than Dino and will make your engine last longer - bottom line.

Advantages include :

No or reduced use of viscosity modifiers which are what break down quickest in dino oil and make it go out of grade

Better viscosity behaviour over wide temp / pressure ranges : ie its thinner when cold, stays thicker / stands up to higher pressures when hot.

Both these things make it a better oil for any engine, old or new.

Obviously if you put Mobil 1 0/30 in an old leaky engine it'll leak like a sieve - 15/50 should be fine.

Mark
__________________
1991 944 S2 (no more, sold it, gone to a good home)

2003 Infiniti G35 Coupe, 280hp, Black
Old 10-03-2003, 09:43 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #7 (permalink)
Registered User
 
ds475's Avatar
 
Join Date: Aug 2003
Location: Austin, Texas
Posts: 717
Send a message via AIM to ds475
Mobil1 is recommended?...
__________________
'82 928S
'85.0 944 Not Awesome - Being Parted Out
Old 10-04-2003, 01:53 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #8 (permalink)
Writer/Teacher
 
CJFusco's Avatar
 
Join Date: Mar 2001
Location: Wandering Connecticut
Posts: 9,288
Garage
Send a message via AIM to CJFusco
Mobil 1 is the oil recommended by Porsche
__________________
Current Stable: Black 07 Porsche Cayman S: FabSpeed Maxflo Exhaust; VividRacing ECU Tune; IPD Competition Plenum; 997GT3 Throttle Body; De-Snork'd.2011 Acura MDX. 2008 Mazda 3. Gone But Not Forgotten:Garnet Red 86 Porsche 951("The Purple Pig"). Silver 09 Mini Cooper S ("Mighty Mouse"). Alpine White 83 Porsche 944 ("Alpine Wolf"). Guards Red 84 Porsche 944. Green 97 Volvo 850 Wagon ("The Viridian Falcon").
Old 10-04-2003, 05:45 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #9 (permalink)
Registered User
 
Manute's Avatar
 
Join Date: Aug 2003
Location: Madrid,Spain
Posts: 728
But would it be disadvantages switching from synth to dino?
At the factory they told me to change to reduce oil consumption....there is no problem? what grade?

I use BP 5W40 synth,also recommended to Porsche....Now they recommend Mobil 1...do you know what this cost at the factory? About $120 6 liters when changing it...

The porsche recommended oil is the one that can pay itīs commercial rights,as always.
__________________
---------------------------------------------
85ī5 951
Old 10-04-2003, 07:39 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #10 (permalink)
Registered User
 
Join Date: Aug 2001
Location: Brighton UK since 11/2012
Posts: 3,170
How many posters have actually seen, or know of, oil related engine failures in any car? I don't mean abuse, running low of oil, lack of realistic oil change intervals, but real, the engine broke because the oil failed, problems. I'm thinking hard here and there isn't one I can remember. Change the oil reasonably regularly, don't drive hard until the engine has warmed up properly and it will last as long as you own the car. Obviously, other things might/will break, YMMV.
__________________
From November 2012; Precision Porsche Specialist
Sussex UK, +44 (0)1825-721-205
2001-2012 Gerber Motorsport Inc. 206-352-6911
07.15.06 1996 Ducati 900SP. Suprisingly enough, it's red
08.16.09 1999 Kawasaki ZRX1100. Green.
Old 10-04-2003, 08:40 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #11 (permalink)
Registered User
 
Join Date: Sep 2002
Location: N. California
Posts: 341
Numerous. I've had 2 cars where the engine was just plain worn out - ie low on compression, noisy cams etc. Also some 944s have this tendancy to spin main bearings which quality oil can certainly help to avoid.

When you consider the improved fuel consumption, the need to change the oil less often, and the improved engine life synthetic doesn't cost any more.

Economics :

Lets say on Dyno oil your engine lasts 180K miles.

At 5K oil changes and $15 per change (oil and filter) thats 180/5 x 15 = $540

Synthetic @10K changes and $35 per change (oil and filter) = $630

Over 180K miles you'll spend $16000 on fuel. Save only 1% (and I think it'll be more like 5%) with synthetic and thats $160.

Synthetic is cheaper even if your engine life is the same. Then consider half the pollution from used engine oil (it has to be recycled, it doesnt just disappear you know.)

A full rebuild on an S2 engine is something like 8K. If you spin a main bearing it's expensive too.

I don't know many people who've had their house burn down but I still take out insurance.

Mark
__________________
1991 944 S2 (no more, sold it, gone to a good home)

2003 Infiniti G35 Coupe, 280hp, Black
Old 10-04-2003, 11:15 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #12 (permalink)
Registered User
 
Join Date: Aug 2001
Location: Brighton UK since 11/2012
Posts: 3,170
Yes, agree with some of that. However, engines wear out anyway, depending on the make and how they are used. The 944 bearing problem seems to be mainly apparent on track use cars. My point is that actual oil-related failures are rare, whether synthetic or dino oil.
Of course, as I have to work in a shop during the day, my idea of maintaining my own cars and yours is way different!!
__________________
From November 2012; Precision Porsche Specialist
Sussex UK, +44 (0)1825-721-205
2001-2012 Gerber Motorsport Inc. 206-352-6911
07.15.06 1996 Ducati 900SP. Suprisingly enough, it's red
08.16.09 1999 Kawasaki ZRX1100. Green.
Old 10-04-2003, 11:58 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #13 (permalink)
Registered User
 
Manute's Avatar
 
Join Date: Aug 2003
Location: Madrid,Spain
Posts: 728
But...is there really changes in fuel consumption with different types of oil??

I donīt know why if i use dyno,my fuel consumption should be higher...fuel and oil are separate things (suposely),if you can illustrate me....

And if switching to dyno makes me to reduce at least a 10% oil consumption,no matter if i have to change oil more often,but it will be cheaper.
If in the factory told me to use dyno because of the leaks and the oil consumption,they would know what are saying...and dont forget we are using engines designed about 20 years ago,when synthetic is not so usual.
__________________
---------------------------------------------
85ī5 951
Old 10-05-2003, 10:40 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #14 (permalink)
Reply

Thread Tools
Rate This Thread
Rate This Thread:

 


All times are GMT -8. The time now is 05:41 PM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page
 

DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.