Oil Change.............Mobil 1?
08-21-2008, 01:55 PM
#76
Owns the Streets
Needs Camber
Lifetime Rennlist
Member
Needs Camber
Lifetime Rennlist
Member
Think the Mobil One creator said the non-lightweight (0w-30 heavier) oils were at least 0.12 on zinc so the older Porsche guys/gals can safely use it.
I don't keep my motor bouncing off the rev limiter so my cams have a LOT less wear than some of you guys.
I don't keep my motor bouncing off the rev limiter so my cams have a LOT less wear than some of you guys.
08-21-2008, 02:31 PM
#77
Former Sponsor
We're running Torco TR-1 (which is a blend) 20-50 and their SR-1 20-50 in the 928's, both with great results.
Since the reason the big oil companies changed from "SL" to "SM" was the zinc and phosphorus that the government claimed they were finding in the cats, I'd guess that the "SM" on the label is actually the clue that there is less of the additives.
Since the reason the big oil companies changed from "SL" to "SM" was the zinc and phosphorus that the government claimed they were finding in the cats, I'd guess that the "SM" on the label is actually the clue that there is less of the additives.
08-21-2008, 02:58 PM
#79
Under the Lift
Lifetime Rennlist
Member
Lifetime Rennlist
Member
Mobil says very clearly that the 15-50 extended performance (SM) does not have lowered the ZDDP.
http://www.mobiloil.com/USA-English/...otor_Oils.aspx
http://www.mobiloil.com/USA-English/...duct_Guide.pdf
http://www.mobiloil.com/USA-English/...otor_Oils.aspx
http://www.mobiloil.com/USA-English/...duct_Guide.pdf
08-21-2008, 03:16 PM
#80
Administrator - "Tyson"
Lifetime Rennlist
Member
Lifetime Rennlist
Member
Mobil says very clearly that the 15-50 extended performance (SM) does not have lowered the ZDDP.
http://www.mobiloil.com/USA-English/...otor_Oils.aspx
http://www.mobiloil.com/USA-English/...duct_Guide.pdf
http://www.mobiloil.com/USA-English/...otor_Oils.aspx
http://www.mobiloil.com/USA-English/...duct_Guide.pdf
08-21-2008, 03:41 PM
#81
Addict
Rennlist Member
Rennlist Member
Join Date: May 2003
Posts: 1,118
Likes: 0
Received 0 Likes
on
0 Posts
Mobil says very clearly that the 15-50 extended performance (SM) does not have lowered the ZDDP.
http://www.mobiloil.com/USA-English/...otor_Oils.aspx
http://www.mobiloil.com/USA-English/...duct_Guide.pdf
http://www.mobiloil.com/USA-English/...otor_Oils.aspx
http://www.mobiloil.com/USA-English/...duct_Guide.pdf
I started changed to the Mobile-One 15W50 Extended Performance a couple of weeks ago. No issues so far with oil pressure or cooling.
http://www.partsamerica.com/productd...tNumber=98HC57
(not affliated....blah....blah...)
08-21-2008, 03:53 PM
#82
Archive Gatekeeper
Rennlist Member
Rennlist Member
Where can the Torco TR-1 be purchased and at what price? Worth a shot at least to try the stuff
Keith- You can get it straight from Torco. Last time this came up on Greg's advice I bought a couple of bottles of ZEP direct from Torco. Now I just need to drive enough to run through my supply of SL-rated Rotella....
http://www.torcoracingoils.com/produ...a-acf007167320
08-21-2008, 04:01 PM
#83
Administrator - "Tyson"
Lifetime Rennlist
Member
Lifetime Rennlist
Member
Keith- You can get it straight from Torco. Last time this came up on Greg's advice I bought a couple of bottles of ZEP direct from Torco. Now I just need to drive enough to run through my supply of SL-rated Rotella....
http://www.torcoracingoils.com/produ...a-acf007167320
http://www.torcoracingoils.com/produ...a-acf007167320
I could use that in my street car and change oil every two years!!
I think I'm going to switch to Redline or Amsoil next year since they are available locally.
08-21-2008, 05:00 PM
#84
Former Sponsor
Yes, the SR-5 is a very high end oil, made from the very best base stocks, which are much more expensive than the generic synthetic stocks that the "everyday" oil companies use. I doubt that many people need that in their street 928's.
The TR-1 oil retails for about $7.00 and the SR-1 is $10.75. Still more than Mobil 1...but the oil is better also...so the comparision in price is a moot point.
I use 5-40 SR-5 in 996 and 997 Cup and RSR engines, where the price of the oil isn't the most significant thing, compared to the cost of the engine.
The TR-1 oil retails for about $7.00 and the SR-1 is $10.75. Still more than Mobil 1...but the oil is better also...so the comparision in price is a moot point.
I use 5-40 SR-5 in 996 and 997 Cup and RSR engines, where the price of the oil isn't the most significant thing, compared to the cost of the engine.
08-21-2008, 05:04 PM
#85
Administrator - "Tyson"
Lifetime Rennlist
Member
Lifetime Rennlist
Member
08-21-2008, 06:19 PM
#86
Under the Lift
Lifetime Rennlist
Member
Lifetime Rennlist
Member
I started changed to the Mobile-One 15W50 Extended Performance a couple of weeks ago. No issues so far with oil pressure or cooling.
http://www.partsamerica.com/productd...tNumber=98HC57
(not affliated....blah....blah...)
http://www.partsamerica.com/productd...tNumber=98HC57
(not affliated....blah....blah...)
08-22-2008, 02:41 PM
#88
Mobil 1 15W-50
Mobil 1 website has a chart that shows the phosphorus (ZDDP) level of MObil 1 15W-50 and 15W-50 extended life are both 1200 PPM. Both are SM rated. There aoppears to be no zinc-related reason to chase old bottles or look for extended life over regular.
http://www.mobiloil.com/USA-English/...duct_Guide.pdf
Steve
http://www.mobiloil.com/USA-English/...duct_Guide.pdf
Steve
08-22-2008, 03:09 PM
#89
Former Sponsor
So the difference between "SL" and "SM" is the label on the bottle?
08-22-2008, 03:26 PM
#90
Administrator - "Tyson"
Lifetime Rennlist
Member
Lifetime Rennlist
Member
jcorenman commented earlier the GF-4 rating contains the lower level of ZDDP, not SM.
The high mileage low ZDDP oils from Mobil 1 have the SM rating along with GF-4. 15w-50 doesn't have the GF-4 rating.
To add to the confusion is this bit from the API website on diesel certificaton for GF-4, not sure how this applies to gas engines:
The high mileage low ZDDP oils from Mobil 1 have the SM rating along with GF-4. 15w-50 doesn't have the GF-4 rating.
To add to the confusion is this bit from the API website on diesel certificaton for GF-4, not sure how this applies to gas engines:
On June 30, 2008, API will discontinue licensing diesel engine oils against the API CF-4 specification. API’s decision to cease CF-4 licensing became necessary after the ASTM Heavy Duty Engine Oil Classification Panel (HDEOCP) determined that it could not establish correlation between a now unavailable engine sequence test required by API as proof of CF-4 performance and existing diesel engine sequence tests. With no viable replacement for this CF-4 test, API had no choice but to discontinue licensing against the CF-4 specification. The Engine Manufacturers Association (EMA) has endorsed API’s decision to discontinue licensing of CF-4.