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Not sure if this thread is still active, but i'll give it a shot. I realize most of this thread is primarily dedicated to air cooled cars. I'd like to get some opinions on oil choice for my '07 997 turbo.
The car has 50,000 miles and modified with ECU tune, modified VTG turbo's, and intercoolers. I'm in NY so I see all types of weather.
The factory fill is Mobil 0W-40 and what i've mostly used. In doing some reading on the various boards some suggest using Mobil 5W-50, or even their turbo-diesel oil. It's also been suggested to use Redline 5W-40 however there have been some strong arguements for/against both of these.
The following is a message I received from somemone on another board (I believe he works for one of the major oil companies):
" My problem with Redline is that they hold no OEM approvals. They claim their product to be ester or partially ester based but are not specific. All I can say is that esters can handle high temperatures well but only if the rest of the formulation is sound.
If it was my vehicle I would stay with the Mobil 1 Euro formulation 0W-40. It has all the credentials & has been through all the approvals testing sucessfully. Redline has not. If they are serious they should get the approvals. The fact that they have not makes me suspicious. I'm tired of these mickey mouse companies buying cheap formulations from the additive peddlers - taking the "meets the requirements of" XYZ route instead of getting the approvals. They could buy a ready approved formulation from the additive majors like Lubrizol, Oronite or Infineum etc. But they don't so they can maximise margin.
Rather stick with the M1 and ensure proper oil cooling. Far more important on a track car."
Any validity to this statement? I'm wondering if i'm overthinking this whole thing, as I change the oil every 5,000 miles. With the new cars and a reasonable change interval, is the oil I use really that important?
So, to make it simple assume i'm looking at 3 different oil choices - Mobil 0W-40, Mobil 5W-50 or Redline 5W-40. BTW, the shop that did the work on my car (past Daytona 24 hr winner) recommended Redline.
The car will be a long term keeper and will end up seeing 100,000 miles or more - God willing LOL.
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