0W Mobil 1 - Engine oil

[JFP in PA]

Originally Posted by tnoice

SO what brand and weight of oil do you use instead of mobil 1?

Currently, we use Castrol Syntec 10W-40 (ACEA A3, B3, B4), which continues to demonstrate very good UoA's. We looked at their 5W-40, but found the 10W-40's ability to stay in grade and demonstrate better TBN's than the lighter version, particularly in M96's that are run hard. The Castrol Syntec line has continued to demonstrate consistent performance over several years. But as many oils "used to be good", we continue to evaluate the Castrol Syntec 10W-40 regularly in our "Trust; but verify" program.

There are a lot of good oils out there, but you need to cut through the marketing hype and look at hard data to make an informed choice. If you want to understand more about oil parameters, take a look at the BITOG website; you will find more data than you ever wanted on all types of lubricants........

[Cloudsurfer]

Originally Posted by JFP in PA

Currently, we use Castrol Syntec 10W-40 (ACEA A3, B3, B3), which continues to demonstrate very good UoA's. We looked at their 5W-40, but found the 10W-40's ability to stay in grade and demonstrate better TBN's than the lighter version, particularly in M96's that are run hard. The Castrol Syntec line has continued to demonstrate consistent performance over several years. But as many oils "used to be good", we continue to evaluate the Castrol Syntec 10W-40 regularly in our "Trust; but verify" program.

There are a lot of good oils out there, but you need to cut through the marketing hype and look at hard data to make an informed choice. If you want to understand more about oil parameters, take a look at the BITOG website; you will find more data than you ever wanted on all types of lubricants........

You can kill days of your life reading the BITOG site That said, there is an obscene amount of information to be had there.

[cas951]

We should all go back to the basics and do what we all normally do when we buy a new product. That is to read the owners manual and see what's recommended there. Chances are the oil recommended in the manual is what was used to develop the engine during R&D which I'm sure Porchse spent many hrs researching and $$ into developing this engine. I'm almost sure 0W-40 is not listed there.

To date I have not found a reason as to why Porsche changed the oil used for older models and use 0W-40 as part of their fill. I seriously doubt there was much R&D done with 0W-40 to older models before this change.

Only reason I can think of is to reduce stock and inventory........