What is the "Best" Transmission Oil?
06-04-2008, 01:05 AM
#31
Instructor
I just filled up my 90 S2 with Redline 75W90 GL 5 "Gear Oil" after reading Clarke Garage's take that GL-5 oils were preferred. hmmmI have already put Redline 75W90 NS in my 87 924S thinking great; a transaxle GL5 oil just for non slip diffs. hmmm
So does an S2 tranny have within it brass or bronze materials? Is this a known factoid?
If that's the case I just might go with Royal Purple's MaxGear 75W90 because they explain their product better. It might be BS, but it sounds good.
Synslide additive technology, Royal Purple's tough, EP lubricating film, provides maximum protection under boundary lubrication conditions typically caused by heavily loaded, slow speed and / or shock load conditions. This tenacious, slippery film significantly improves lubrication and reduces wear by increasing the oil film thickness and toughness, which helps to prevent metal-to-metal contact in gears and bearings.
Synslide additive technology is noncorrosive to gears and bearings, including case-hardened gears that are easily pitted by conventional sulfur-phosphorus EP oils.
06-04-2008, 08:19 AM
#32
Drifting
so what's recomended for a 944?
since mine is on jackstands waiting for bearings, might as well undo 1 bolt and change the transmission fluid now, I think
mine is an early car, but I'm unsure of what Porsche calls for or what will work; all parts stores here have mobile 1 75-90 but I've looked around and some people are saying it can be bad for syncro's
and when doing a search, all answers I'm finding to the topic are "go do a search" but no definetive answer ...
since mine is on jackstands waiting for bearings, might as well undo 1 bolt and change the transmission fluid now, I think
mine is an early car, but I'm unsure of what Porsche calls for or what will work; all parts stores here have mobile 1 75-90 but I've looked around and some people are saying it can be bad for syncro's
and when doing a search, all answers I'm finding to the topic are "go do a search" but no definetive answer ...
06-04-2008, 03:06 PM
#37
Instructor
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Originally Posted by ArcticSteve
I dunno I just filled up my 90 S2 with Redline 75W90 GL 5 "Gear Oil" after reading Clarke Garage's take that GL-5 oils were preferred. hmmm
I have already put Redline 75W90 NS in my 87 924S thinking great; a transaxle GL5 oil just for non slip diffs. hmmm
So does an S2 tranny have within it brass or bronze materials? Is this a known factoid?
If that's the case I just might go with Royal Purple's MaxGear 75W90 because they explain their product better. It might be BS, but it sounds good.
Synslide additive technology, Royal Purple's tough, EP lubricating film, provides maximum protection under boundary lubrication conditions typically caused by heavily loaded, slow speed and / or shock load conditions. This tenacious, slippery film significantly improves lubrication and reduces wear by increasing the oil film thickness and toughness, which helps to prevent metal-to-metal contact in gears and bearings.
Synslide additive technology is noncorrosive to gears and bearings, including case-hardened gears that are easily pitted by conventional sulfur-phosphorus EP oils.
I have already put Redline 75W90 NS in my 87 924S thinking great; a transaxle GL5 oil just for non slip diffs. hmmm
So does an S2 tranny have within it brass or bronze materials? Is this a known factoid?
If that's the case I just might go with Royal Purple's MaxGear 75W90 because they explain their product better. It might be BS, but it sounds good.
Synslide additive technology, Royal Purple's tough, EP lubricating film, provides maximum protection under boundary lubrication conditions typically caused by heavily loaded, slow speed and / or shock load conditions. This tenacious, slippery film significantly improves lubrication and reduces wear by increasing the oil film thickness and toughness, which helps to prevent metal-to-metal contact in gears and bearings.
Synslide additive technology is noncorrosive to gears and bearings, including case-hardened gears that are easily pitted by conventional sulfur-phosphorus EP oils.
As for the recommendation in Clark's garage, it is easy to assume that GL-5 is backward compatible to GL-4 requirements because it's that way for many other lubricants (API ratings on motor oils and Dexron I-II-III). It wasn't until I spoke with a Penzoil engineer some 15 years ago that I found this wasn't the case with GL-4 and GL-5. This is confirmed in Redline's documentation.
06-05-2008, 09:39 PM
#41
Rennlist Member
Thread Starter
09-10-2008, 09:00 AM
#42
Drifting
never updated this, but my car now has Redline MT-90 transmission oil and 20w-50 motor oil
give it a few days and you'll notice the difference with every day that goes by, if this is 1st time you are doing this!
/necro-bump
and a question: for winter, should I change the oil again to something different? car only saw about 300 miles after the oil change
give it a few days and you'll notice the difference with every day that goes by, if this is 1st time you are doing this!
/necro-bump
and a question: for winter, should I change the oil again to something different? car only saw about 300 miles after the oil change
09-10-2008, 12:12 PM
#44
Drifting
are you guys with "grinds" short shifted? because mine is perfect, but I do take it easy with shifting after I lost 1st/2nd/R in my A6 (and I believe it to be due to having a shifter improperly installed by my cousin_
09-10-2008, 01:33 PM
#45
Rennlist Member
Your engine will be noticeably slower when cranking, when the oil gets too thick for the temp