Which engine oil ???
 

Which would you guys recommend
0W-40 or 5W-40 ???

Thanks

Seriously, if you want to read for hours, just do a search... it's all here.

Thanks :)

Mileage? I'd likely lean towards 0W-XX, but there are plenty of folks here that would disagree with me...

I've used the following oils with excellent results (Blackstone UOA's):

Red Line 5W40
Mobil One 5W50

I am now trying Joe Gibbs (Raby approved) DT40 5W40.

2006 Boxster S
over 50,000 miles
6,500 miles oil change intervals (once per driving season April-Oct)

This topic has been covered over and over and over again, countless times in this forum. Try using the search function.

At the end of the day you will not get a definitive answer, just a lot of differing opinions, and you'll have to make up your own mind. Neither selection is wrong.

Same answer applies to tire selection.

Mobil1 15-50, track and street, 5,000 mile intervals.

Thanks for your help Guys.
Being a noobie and 1st time Boxster owner I am thrilled and excited to get on with it :)
Obviously will keep a sharp eye out for any oil leaks , and will have my IMS and RMS replaced
as soon as there is any visible oil marks on the floor !!
Mine is a 2.7 2000 model with 34K , so will be expecting the dreaded leak in the future :)

By the way ,

I opted for 0W-40 Castrol Edge

No disrespect, but of all the opinions listed, this is absolutely the worst recommendation I've seen. I would never run oil that heavy unless I was running a car with 250,000 hard miles in Dubai...in the summer.

What is your reasoning for running oil so for outside the parameters of what Porsche recommends and moreover with a viscosity far beyond what your modern engine was designed for?

That's funny.
Looks like this subject always creates an argument.
I remember when I firs joined the forum I asked the same question.
Based on the answer I got, I decided to go with castrol 10-40. But I live in Florida :D
What intrigues me (and I'm still looking for an answe) is how come most of the people are using 0-40, when the owner manual is not recommending this option.
Yes, look at your manual and you will find out recomendetion for oil weights based on ambient temperature.
15-50 is on the list. 0-40, not.
So where did it came from :confused:
BTW you can find the same information in the Bentley book.

To be clear, it wasn't intended as a reco' - it was just what I use, although his question is clear.

The M96 engine itself tends to run hotter than a straight or V-6, then add in the Dallas ambient street and track temps often exceed 130 through 4 months of the year. The Mobil1 15-50 is measured to have a high film strength. (Couldn't get Castrol at last oil change)

My oil analysis from Blackstone are coming back clean, so there are my reasons.

Porsche recommends oil changes at 15k miles and I don't do that either.
And a "viscosity far beyond what your modern engine was designed for" .... maybe you can support that, because there is support out there for 15-50.
Modern? No vario-cam and an IMS in my M96. That should end the "modern" discussion. :cheers:

Meir, the short answer is, that Porsche is updating their recommended oils list all the time (yearly) for brand and viscosity. So, our Owner's Manuals become out dated in short order. Same is true for recommended service intervals.

good answer.
thanks.

I'm trying 5W-40 Valvoline full synthetic. We drive in spring, summer and fall in northern Ohio. It's on sale at Napa for 5.40 per quart.

What flavor said is absolutely true. Also I would add that the XXW number is a measure of of how the oil flows (or doesn't flow) at a 100df. The -XX number is a measure of how oil flows at operating temp 212df. So 10w-40 and 0w-40 perform (read flow) quite differently at 100df, but exactly the same at 212df. My primary concern is start up lubrication. Which almost no oil does adequately.

While I use Blackstone for analysis on several vehicles and enjoy their plain speaking way of explaining each annualized sample, the are still measuring trends.

There is no logical reason I can think of to run 15W multigrade in a water cooled engine with modern tolerances unless those tolerances have widened to such a degree that it is required to maintain pressure. Even if i lived in Phoenix, I'd not be running
15w-XX. At colder temps, much of an oil of heavier XXw is likely pushed right through the bypass.

This.

Been running Mobil 1 20-50 and it's been great.

I need TP for my bungTrollio!:troll: :):):):rolleyes::cheers:

I've got a 180.000 K's on the clock.
I'm going with 0w40 Mobile1 when it's time to fill.

:dance:

Yeah, you're definitely due for an oil change... :D