Switching back to M1...

[Flying_A]

Hey all,
After the not so great run of Ultra 5W-40 in my 911, I will be switching back to Mobil 1. During cold starts I've continued to experience quite a bit of valvetrain noise since switching to the Ultra. Being that the motors of these cars can be problematic and very temperamental, I'm going back to the factory fill for piece of mind. I just wanted to try something else out for fun but the clear increase in engine noise has me freaking out a bit.

With that all said, both the 0W-40 and 5W-50 meet the Porsche A40 engine standards and with the warm California months of summer coming (90*-100*+), maybe the 5W-50 would be more appropriate. The car is getting up there in mileage, 109K, is only driven on the weekends and drive it about 3,000 miles a year. When running 5W/0W-40, I change the oil once a year. With the 5W-50, I'd probably revert to going with 0W-40 for winter months. Probably over kill as we don't see temps and colder than 35*. Car has a 10qt dry sump, recommended oil changes are 10,000 miles intervals. As I only change the oil once or twice a year at most on this thing, money isn't really a factor. Thanks for your input!

 

[PZR2874]

Suprised it made that much of a difference

 

[MetalSlug]

grat for switch back

 

[dave1251]

Why not go the Dr's route of using RL 0W-20 for that motor?

 

[hardcore302]

Let us know if you're happy after you switch back.

 

[Flying_A]

Originally Posted By: dave1251
Why not go the Dr's route of using RL 0W-20 for that motor?


With all due respect, why would I consider a non approved Porsche product, let alone a 0W-20 in an engine that would cost me nearly $15,000 to replace due to a lubrication failure?

 

[KCJeep]

Did you use the same filter brand/type?

 

[typ901]

Originally Posted By: Flying_A
Originally Posted By: dave1251
Why not go the Dr's route of using RL 0W-20 for that motor?


With all due respect, why would I consider a non approved Porsche product, let alone a 0W-20 in an engine that would cost me nearly $15,000 to replace due to a lubrication failure?


Yeah save the 20 weight in the Rover instead!

 

[Lead Shoes]

Originally Posted By: Flying_A
Originally Posted By: dave1251
Why not go the Dr's route of using RL 0W-20 for that motor?


With all due respect, why would I consider a non approved Porsche product, let alone a 0W-20 in an engine that would cost me nearly $15,000 to replace due to a lubrication failure?


Idk, we ask him the same thing, but he knows better than the manufacturer

 

[Flying_A]

Originally Posted By: KCJeep
Did you use the same filter brand/type?


OEM filter... These cars do not have your traditional metal/canister type filter. It's just paper filter like most other German cars.

Originally Posted By: Brenden
Originally Posted By: Flying_A
Originally Posted By: dave1251
Why not go the Dr's route of using RL 0W-20 for that motor?


With all due respect, why would I consider a non approved Porsche product, let alone a 0W-20 in an engine that would cost me nearly $15,000 to replace due to a lubrication failure?


Idk, we ask him the same thing, but he knows better than the manufacturer

Not that I'm disputing his knowledge about oil but with the almost infinite amount of r and d at a company like Porsche, what makes him more qualified?

 

[dave1251]

Originally Posted By: Flying_A
Originally Posted By: KCJeep
Did you use the same filter brand/type?


OEM filter... These cars do not have your traditional metal/canister type filter. It's just paper filter like most other German cars.

Originally Posted By: Brenden
Originally Posted By: Flying_A
Originally Posted By: dave1251
Why not go the Dr's route of using RL 0W-20 for that motor?


With all due respect, why would I consider a non approved Porsche product, let alone a 0W-20 in an engine that would cost me nearly $15,000 to replace due to a lubrication failure?


Idk, we ask him the same thing, but he knows better than the manufacturer

Not that I'm disputing his knowledge about oil but with the almost infinite amount of r and d at a company like Porsche, what makes him more qualified?


I am sorry my attempt at humor backfired on me. I bid you a Good Day!

 

[RedCorvette]

Originally Posted By: Flying_A
Not that I'm disputing his knowledge about oil but with the almost infinite amount of r and d at a company like Porsche, what makes him more qualified?


It's simply that in his case, his operating temperature never gets to what Porsche and the other manufacturer's expect it to, so his oil is not overly thin at his operating temperature.

And before he gets to the operating temp, which is what he is most interested in (because that is where wear occurs) his oil is thinner than it would be than if he used the recommended oil. So it is protecting more and giving him better fuel economy.

 

[Coprolite]

Originally Posted By: RedCorvette
Originally Posted By: Flying_A
Not that I'm disputing his knowledge about oil but with the almost infinite amount of r and d at a company like Porsche, what makes him more qualified?


It's simply that in his case, his operating temperature never gets to what Porsche and the other manufacturer's expect it to, so his oil is not overly thin at his operating temperature.

And before he gets to the operating temp, which is what he is most interested in (because that is where wear occurs) his oil is thinner than it would be than if he used the recommended oil. So it is protecting more and giving him better fuel economy.


It is also his money and freedom to use anything he wants.

 

[LeakySeals]

Wow, this is a change, usually everyone talking about the iron in M1 rattling around the valve train.

 

[Dakir]

Originally Posted By: LeakySeals
Wow, this is a change, usually everyone talking about the iron in M1 rattling around the valve train.


Agreed, I would give the new full synthetic kendall gt1 with titanium a shot it's a steal price wise and has a bit of eveything good in it.

 

[HTSS_TR]

Originally Posted By: RedCorvette
Originally Posted By: Flying_A
Not that I'm disputing his knowledge about oil but with the almost infinite amount of r and d at a company like Porsche, what makes him more qualified?


It's simply that in his case, his operating temperature never gets to what Porsche and the other manufacturer's expect it to, so his oil is not overly thin at his operating temperature.

And before he gets to the operating temp, which is what he is most interested in (because that is where wear occurs) his oil is thinner than it would be than if he used the recommended oil. So it is protecting more and giving him better fuel economy.

I agree. His oil usage is working well for his driving condition, which is not the same with others.

I think at 170-180F a thin 0W20(Toyota 0W20) is still thicker than xW50 at 250-260F. For short driving distance, 8-10 miles or less, the oil temperature will not be above 170-180F, then why not use the thinnest oil available ?

 

[Leo]

Maybe the tiny fuel mileage improvement isn't of any concern to him?

 

[Capa]

I recently went from an 0W-40 to a 0W-20 in a V8 and have seen around 8% MPG gain, which I wouldn't call a tiny improvement.

 

[Flying_A]

Originally Posted By: dave1251
[/quote]

I am sorry my attempt at humor backfired on me. I bid you a Good Day!


Haha I now see what you did there

And a good day to you sir!

 

[Flying_A]

Originally Posted By: Leo
Maybe the tiny fuel mileage improvement isn't of any concern to him?


You are correct, even an 8% fuel mileage improvement on a car that sees 4k miles a year tops is not worth risking an engine rebuild for the sake of saving 300 miles in gas. This is not your average engine and experimenting with 20W oils etc is just not worth it. So I'll be sticking with factory approved products.