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The 0w40 would seem to be too light a weight for the average summer temps here. Would 5w50 be a better choice. I don't have the car yet, but am curious as to what more experienced people would suggest. I have read on this forum that the light weight oil and high temps will contribute to RMS leaks.

Thanks

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The 0w40 would seem to be too light a weight for the average summer temps here. Would 5w50 be a better choice. I don't have the car yet, but am curious as to what more experienced people would suggest. I have read on this forum that the light weight oil and high temps will contribute to RMS leaks.

Thanks

0w40 is the wrong choice and 5w50 is better, but I would recommend 15W50 in your neck of the woods.

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The 0w40 would seem to be too light a weight for the average summer temps here. Would 5w50 be a better choice. I don't have the car yet, but am curious as to what more experienced people would suggest. I have read on this forum that the light weight oil and high temps will contribute to RMS leaks.

Thanks

0w40 is the wrong choice and 5w50 is better, but I would recommend 15W50 in your neck of the woods.

I would stick with only what Porsche recommends. :wrench:

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I reside in Miami and I have just done my oil change with 0w -40 as per Renntechs Oil Change instructions, its the first Oil Change I have done, I was also advised this by a Mechanic down here and Mobil One has a neat Oil Selection guide on its website. It says 0w- 40 is the oil of choice.

http://www.mobil.com/USA-English/Lubes/PDS...obil1_0W-40.asp

However if this changes due to the South Florida weather, please let me know and i will change it up.

Is there such a huge difference?

Im not all that clued up on this.

Thanx

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  • 2 weeks later...

I'm a retired Mobil Oil exec who's also into Porsches. I just visited Zuffenhausen in July. Each engine is tested with and refilled at the factory with Mobil 1 0W-40. Despite the fact that Porsche doesn't know the ultimate operating destination of each vehicle.

Porsche and Mobil developed the 0W-40 jointly. And as noted above, "I would stick with only what Porsche recommends".

And our research folks do too. I was chided by the head of Mobil 1 research for mentioning that I would put Mobil 1, 15W-50 into my 997. He said that the 0W-40 is the oil to use. (Suspect that it has something to do with the hydraulic lifters, but don't quote me.)

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I'm a retired Mobil Oil exec who's also into Porsches.  I just visited Zuffenhausen in July.  Each engine is tested with and refilled at the factory with Mobil 1 0W-40.  Despite the fact that Porsche doesn't know the ultimate operating destination of each vehicle.

Porsche and Mobil developed the 0W-40 jointly.  And as noted above, "I would stick with only what Porsche recommends".

And our research folks do too.  I was chided by the head of Mobil 1 research for mentioning that I would put Mobil 1, 15W-50 into my 997.  He said that the 0W-40 is the oil to use.  (Suspect that it has something to do with the hydraulic lifters, but don't quote me.)

Does us a favor. Ask your research guy for details. It may finally settle this question at least until the next great oil comes out.

Things I would ask:

What if the car is run in very hot weather, 90-120 degrees?

What if the car is a track car only? Car is at/near redline most of the time.

Is it truly the lifter issue? Before 2000 there was no 0W-40. 15W-50 was a recommended oil and now it is not, why?

There is a 5W-40 "Truck and SUV" formulation. It has applicable API certifications but not ACEA. Is this a viable alternative? If not why not?

Thanks for any clarification that you could provide.

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