Mobil One gear oil
07-27-2001, 07:50 AM
#2
Carlos,
Mine is an 82'.
I've heard that -On this site- That you don't want to leave Mobile One in the car for winter storage and that your 928 MAY develope seal and gasket leaks when you use the product for extended periods.
That said; I switched to Mobile One three weeks ago and the following were the only new developements:
1.) My Idle speed, already VERY low, dropped even further.
2.) My oil pressure gauge, actually, now indicates something other than zero or 5+ (max). It moves with changes in rpm/acceleration/idling etc...
3.) Seat of the pants tells me that I'm accelerating slightly quicker.
4.) The engine tone is different i.e. ... quieter when accelerating and downshifting.
5.) No leaks YET!
In short small changes and no problems.
As to the oil pressure the oil filter May have been restricted causing a pressure increase (5+ all the time).
The quicker acceleration and quiter engine/exhaust MAY be the result of my installing a K&N air filter. And running a fuel system ( valve/injector) cleaner through two tanks of gas.
Hope this helps.
Later, keep em' rolling
John Struthers 82' Weissach, Auto.
' Pattycakes'
RPM Change
Mine is an 82'.
I've heard that -On this site- That you don't want to leave Mobile One in the car for winter storage and that your 928 MAY develope seal and gasket leaks when you use the product for extended periods.
That said; I switched to Mobile One three weeks ago and the following were the only new developements:
1.) My Idle speed, already VERY low, dropped even further.
2.) My oil pressure gauge, actually, now indicates something other than zero or 5+ (max). It moves with changes in rpm/acceleration/idling etc...
3.) Seat of the pants tells me that I'm accelerating slightly quicker.
4.) The engine tone is different i.e. ... quieter when accelerating and downshifting.
5.) No leaks YET!
In short small changes and no problems.
As to the oil pressure the oil filter May have been restricted causing a pressure increase (5+ all the time).
The quicker acceleration and quiter engine/exhaust MAY be the result of my installing a K&N air filter. And running a fuel system ( valve/injector) cleaner through two tanks of gas.
Hope this helps.
Later, keep em' rolling
John Struthers 82' Weissach, Auto.
' Pattycakes'
RPM Change
07-27-2001, 08:31 AM
#3
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Careful about the K&N John, there are some here that find it a cause for ridicule (the same mentality that thinks wiper refils that are not Porsche brand, make your car a frankenstein. But I'm with you. I think my car revs quicker and is more responsive since the K&N. I recently switched to mobil 1 engine oil too. Can't say I noticed any difference there. What I was actually trying to find out is about is gear oil. Is the regular mobil 1 stuff in Pep boys the right stuff?
07-27-2001, 08:37 AM
#4
Burning Brakes
The K&N filter is more free-flowing that the OEM filter. However, it also allows more particles to pass through it and into the intake system. YMMV.
I only use my K&N when I'm about to do some performance driving. For regular street driving I use the OEM filter.
I only use my K&N when I'm about to do some performance driving. For regular street driving I use the OEM filter.
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07-27-2001, 10:44 AM
#8
Burning Brakes
I was not aware of them. I am aware of an aftermarket throttlebody and adjustable fuel pressure regulators. Those may help get more fuel/air into the cylinders, and thus increase HP.
Also, DASTEK ECU units are being used by some 928ers in an attempt to tweek the ignition and fuel delivery systems even more.
Also, DASTEK ECU units are being used by some 928ers in an attempt to tweek the ignition and fuel delivery systems even more.
07-27-2001, 12:12 PM
#9
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Carlos,
I have been very pleased with the SWEPCO gear lube. I have the older style synchros in my tranny, and noticed a significant improvement in shifting. It seems much smoother and easier to downshift. I believe the Porsche dealerships may carry the SWEPCO products. Anyway, Goog luck, and let me know what direction you went in.
I have been very pleased with the SWEPCO gear lube. I have the older style synchros in my tranny, and noticed a significant improvement in shifting. It seems much smoother and easier to downshift. I believe the Porsche dealerships may carry the SWEPCO products. Anyway, Goog luck, and let me know what direction you went in.
07-27-2001, 03:43 PM
#10
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I have the limited slip diff on mine and I use Mobil 1 gear oil (90w)and seems to work just fine. Shifts nice, not scary around corners under acceleration. I'm not racer-x,so I don't know what the track conditions would be like. I think the viscosity should be similar under higher temps.
07-28-2001, 06:13 AM
#12
Carlos,
I guess I should RTFQ.
I know zip about alternative gear oils.
I thought ALL Hypoid 90 weight gear oils would met specification and had no idea that some would provide smoother operation than others. But, then again, with small but seemingly apparent changes to engine performance after changing to Mobile I suppose I should have made the guarded assumtion.
Ed if you read this another assumtion could have been made that if the K&N filter passes more air it probably passes more dirt molecules I'll try to get a factual response from K&N. In the meantime posts from all Quarters accepted concering the K&N happily accepted for review.
By the Way ! The exchange by all RE: HP gains vs dinero spent was a hoot. Keeping in mind the different strokes for different folks factor I would, as a practical matter, run with the small block chev crowd.
But to be honest it would wind up in a project car that would be street racing as opposed to club/sanctioned events. Without a doubt most 928 owners do "a little" street romping on a weekly if not daily basis and as long as your opponent thinks he/she is racing and losing to a Porsche what's the harm. As for longevity; I wonder if a 200,000 mile Porsche is a rule of thumb or not. Given the 928 Odometer glitches there might be quite a few. WHO knows for sure?
Differing views is a good thing as long as it doesn't get REAL UGLY, keep up the bantering.
John
82' Weissach, Auto. 'Pattycakes'
I guess I should RTFQ.
I know zip about alternative gear oils.
I thought ALL Hypoid 90 weight gear oils would met specification and had no idea that some would provide smoother operation than others. But, then again, with small but seemingly apparent changes to engine performance after changing to Mobile I suppose I should have made the guarded assumtion.
Ed if you read this another assumtion could have been made that if the K&N filter passes more air it probably passes more dirt molecules I'll try to get a factual response from K&N. In the meantime posts from all Quarters accepted concering the K&N happily accepted for review.
By the Way ! The exchange by all RE: HP gains vs dinero spent was a hoot. Keeping in mind the different strokes for different folks factor I would, as a practical matter, run with the small block chev crowd.
But to be honest it would wind up in a project car that would be street racing as opposed to club/sanctioned events. Without a doubt most 928 owners do "a little" street romping on a weekly if not daily basis and as long as your opponent thinks he/she is racing and losing to a Porsche what's the harm. As for longevity; I wonder if a 200,000 mile Porsche is a rule of thumb or not. Given the 928 Odometer glitches there might be quite a few. WHO knows for sure?
Differing views is a good thing as long as it doesn't get REAL UGLY, keep up the bantering.
John
82' Weissach, Auto. 'Pattycakes'
07-28-2001, 07:56 AM
#13
Burning Brakes
Redline is in my GT's gearbox. I've used Mobil synthetic as well with good results. SWEPCO makes excellent lubricants, but is a bit hard to find and rather pricey for a non-synthetic. YMMV.
The fact that I've seen various insect body parts on the wire mesh screen of my MAF seems to suggest that the K&N filter is more of a screen than a filter. Nothing appears on the MAF screen when I use the OEM filter, which is why I use it 95% of the time.
How long or far a 928 can go is very subjective. I've been told that the engines are engineered to go at least 300k miles. There are hearsay reports that one 928 has over 600k miles on its odometer. I'm sure other high mileage testimonials could be obtained if a proper survey were conducted.
The fact that I've seen various insect body parts on the wire mesh screen of my MAF seems to suggest that the K&N filter is more of a screen than a filter. Nothing appears on the MAF screen when I use the OEM filter, which is why I use it 95% of the time.
How long or far a 928 can go is very subjective. I've been told that the engines are engineered to go at least 300k miles. There are hearsay reports that one 928 has over 600k miles on its odometer. I'm sure other high mileage testimonials could be obtained if a proper survey were conducted.
07-28-2001, 11:17 AM
#14
ED,
I'll be wandering down to clean and lube ye olde idle stabilizer valve this week-end.
And I'll probably start cleaning everything in sight. Since the K&N has to come out the throttle body shall fall under my steely gaze. I'll post if I find any debrs or dust.
A study on individual 928 miles would be interesting. It could already be a linear study broken down by production year, though personally, factoring all the new/rebuilt or
intermittently operating odometers and multiple owners who let the odometer glitches ride would be a bitch. If we could a MTBF (mean time before failure) survey would also be cool . It would help to 'map'
wear out time frames for parts and assist owners as well as vendors predict, save for, or stock parts. I'd be all for a large base comprehensive gathering of survey data gathering.
Well Pattycakes is waiting for abath and wax rubdown.
later, keep em' rolling, Snowball are you rolling today?
John Struthers
82' Weissach, Auto. Pattycakes
I'll be wandering down to clean and lube ye olde idle stabilizer valve this week-end.
And I'll probably start cleaning everything in sight. Since the K&N has to come out the throttle body shall fall under my steely gaze. I'll post if I find any debrs or dust.
A study on individual 928 miles would be interesting. It could already be a linear study broken down by production year, though personally, factoring all the new/rebuilt or
intermittently operating odometers and multiple owners who let the odometer glitches ride would be a bitch. If we could a MTBF (mean time before failure) survey would also be cool . It would help to 'map'
wear out time frames for parts and assist owners as well as vendors predict, save for, or stock parts. I'd be all for a large base comprehensive gathering of survey data gathering.
Well Pattycakes is waiting for abath and wax rubdown.
later, keep em' rolling, Snowball are you rolling today?
John Struthers
82' Weissach, Auto. Pattycakes
07-30-2001, 03:50 AM
#15
Carlos,
Wishing Snowball a quick alignment/cornerbalance and recovery.
As to the Austin Crew - they have a website-
see page 2, Desperately seeking....- I'm considering asking them if they will accept me as an auxillary member. Keep in mind that everything south of the city limits is probably North San Antonio. And yeah, the drivers here in Texass - I'm an expatriate Western Pennsylvanian - drive right up to the *** end of traffic, slam on the brakes, only then use their mirrors, swerve back into traffic, cut the car off that that's being passed and start all over again . NO!!
You never get used to it. But speaking of crappy places to drive... In my misspent youth I used to cruise down to Morgantown to visit friends at college via old Rte 8 or was that Rte 19? In any case, let me tell you there was little joy in following those four speed COAL trucks - slow, slower, real slow and even slower - which apparently were powered by whatever coal didn't fall off and onto the winding two lane road. The problem was componded in the fall by the Geezers checking out the colorful foilage. I hope things have changed or at least you live in another part of West By God Virginia.
Non-critical nice to have items????
later, keep em' rolling,
John 82' Weissach, Auto. "Pattycakes"
Wishing Snowball a quick alignment/cornerbalance and recovery.
As to the Austin Crew - they have a website-
see page 2, Desperately seeking....- I'm considering asking them if they will accept me as an auxillary member. Keep in mind that everything south of the city limits is probably North San Antonio. And yeah, the drivers here in Texass - I'm an expatriate Western Pennsylvanian - drive right up to the *** end of traffic, slam on the brakes, only then use their mirrors, swerve back into traffic, cut the car off that that's being passed and start all over again . NO!!
You never get used to it. But speaking of crappy places to drive... In my misspent youth I used to cruise down to Morgantown to visit friends at college via old Rte 8 or was that Rte 19? In any case, let me tell you there was little joy in following those four speed COAL trucks - slow, slower, real slow and even slower - which apparently were powered by whatever coal didn't fall off and onto the winding two lane road. The problem was componded in the fall by the Geezers checking out the colorful foilage. I hope things have changed or at least you live in another part of West By God Virginia.
Non-critical nice to have items????
later, keep em' rolling,
John 82' Weissach, Auto. "Pattycakes"