Discussion
Thanks guys.
I talked to my Red Line supplier who also is a top crew chief in the area, and he suggested Red Line Heavy Duty which is red in color, because of the higher horsepower. That's what they have been using at the Rolex 24Hr at Daytona the last few years where he's been working.
I ordered 6 quarts. I think with the cooling system I'll need to put in at least 4.
Jack
I talked to my Red Line supplier who also is a top crew chief in the area, and he suggested Red Line Heavy Duty which is red in color, because of the higher horsepower. That's what they have been using at the Rolex 24Hr at Daytona the last few years where he's been working.
I ordered 6 quarts. I think with the cooling system I'll need to put in at least 4.
Jack
Personally the oil that I am going to use in my transaxle is EP 75/90 semi synthetic which is the lubricant that Porsche specify to be used in their transaxles and is also recommended by the Ultima factory.
I have evey confidence that Porsche have extensively tested their products and have selected this particular lubricant for very good reasons. As my transaxle has to cope with over 550 ft/lbs of torque I do not want to risk using un-proved after market products in my drivetrain thank you.
Just because some product has been used in a modified race transaxle does not prove it for road use in a standard unit.
I have evey confidence that Porsche have extensively tested their products and have selected this particular lubricant for very good reasons. As my transaxle has to cope with over 550 ft/lbs of torque I do not want to risk using un-proved after market products in my drivetrain thank you.
Just because some product has been used in a modified race transaxle does not prove it for road use in a standard unit.
There are quite often completely non technical reasons for why a particular manufacturer recommends a particular oil for use in their cars. It might be "good enough" technically, and they can get it cheap (remember that a manufacturer the size of Porsche will buy an awful lot of oil in a year, and cost control comes into everything.
You also mention that your engine is producing huge amounts of torque, more than a standard Porsche road car. For this reason, you may wish to go for a higher spec oil.
At the end of the day, it's all down to personal choice. Porsche recommend a certain oil for whatever reasons they may have (both commercial and technical). Ultima suggest the same oil for their own reasons (I don't know, there may be some sort of liability issue if they tell you to use a particular oil and your gearbox blows up, whereas if they just tell you to use what Porsche use, they can't be held responsible).
Don't go flaming people on this list simply for exchangine experiences. Some people here have more expereince at building and running cars than others. They pass on their experiences via this forum.
James
You also mention that your engine is producing huge amounts of torque, more than a standard Porsche road car. For this reason, you may wish to go for a higher spec oil.
At the end of the day, it's all down to personal choice. Porsche recommend a certain oil for whatever reasons they may have (both commercial and technical). Ultima suggest the same oil for their own reasons (I don't know, there may be some sort of liability issue if they tell you to use a particular oil and your gearbox blows up, whereas if they just tell you to use what Porsche use, they can't be held responsible).
Don't go flaming people on this list simply for exchangine experiences. Some people here have more expereince at building and running cars than others. They pass on their experiences via this forum.
James
Well I used a mix of Fairy liquid and sicoflex with WD40 as the binding agent!!!!
Seriously though. I used what the factory recomend and I personnelly think there is more of a concern about the level to fill to (as long as you use the right spec box oil).
By turning the box upside down there is a requirement to put more oil in than Porsche specify. It will also be made more difficult by any cooling systems used.
You need to speak to the factory and dicuss the exact requirements of your own box/specification.
Seriously though. I used what the factory recomend and I personnelly think there is more of a concern about the level to fill to (as long as you use the right spec box oil).
By turning the box upside down there is a requirement to put more oil in than Porsche specify. It will also be made more difficult by any cooling systems used.
You need to speak to the factory and dicuss the exact requirements of your own box/specification.
Based on experience, I used Redline in the first box that failed when case-hardening on the crownwheel broke up, it may have had nothing to do with the oil, but for the second box I used Miller semi-synthetic.
The second box has covered more than twice the mileage with no problems. (He said with fingers crossed)
The second box has covered more than twice the mileage with no problems. (He said with fingers crossed)
B1 ECC said: Based on experience, I used Redline in the first box that failed when case-hardening on the crownwheel broke up, it may have had nothing to do with the oil, but for the second box I used Miller semi-synthetic.
The second box has covered more than twice the mileage with no problems. (He said with fingers crossed)
I seem to remember that Miller is dirt cheap by comparison too. Who says quality costs??
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