OK I may be a little naive here & I don't pretend to know anything about engines & lubricants, but I just had a service from MCL Porsche Vancouver & they used M1.
In fact my car has had M1 from the official Porsche dealer from factory until now.

Why would Porsche still keep using M1 if it is bad for my engine?

:confused:

^ well if they stopped using it because they didn't like the new formulation, that would probably open the door to the lawyers representing Porsche owners with fried engines.

Like Brucelee wrote, "Porsche specs a 40 wght oil for this engine, not 10W-30". I don't know where people get 10W30 is OK, except from other cars. Ours specifically states 0W40. There’s one thing I've always been told, you can swap oil manufactures but not oil weights.

BTW, last night I gave my Boxster 9.25 quarts of the good stuff, Royal Purple 0W40 at the cost of $100. Worth every penny.

The approved list on the TSB does not have one 30 weight. There are 0W-40, 5W-40, and 5W-50 weights approved for worldwide or USA/Canada.

Most are Mobil 1, but there are four Total Quartz and Activa oils, including a 5W-40 diesel oil.

I'm going back to 5W-40 when I change my oil and filter next month. Probably will go with the LN adapter for spin on filters.

By the way, the approvals have expiration dates, tho manufacturers can request and sometimes receive extensions. Two M1s expire late this year.

+1 on the Royal Purple. Charles Navarro at LN recommends 5W40 over 0W40, due to it's stronger foundation. I've run 5W40 and 10W40 Royal Purple, as my car only sees warm weather. After reading all the current write-ups, I may go back to the 10W40, as the base oil is exponentially different from 0W, all the way to 10W.

10w-30 are listed in the owners manual. This depends on year.

Yep PL, it is a hot topic on a lot of boards. Saw a Jake Raby posting on another board (maybe Boxsterspec?) that he won't make oil recommendation because of the ensuing fireworks.

I'm going to use an approved oil, but not sure which. Just in case I ever have to try to negotiate an IED engine deal with Porsche.

Don't go by owners manual when Porsche issues approval in a regularly updated TSB and the approvals all have expiration dates.

You can read TSBs at RennTech if you are a contributing member. I highly recommend RennTech membership. It is pure tech w/o the OT fun and games. Access to a lot of documents.

Also the approved list I posted earlier was not all inclusive, just a sample showing the Mobil numbers relative to one other company.

What's a good price for Royal Purple per quart? I see them on Ebay with free shipping. Just ordered a couple of Mahle filters. Time to rinse and repeat.
Otherwise I'm going to see if I can find some Castrol Syntec locally.

PL, I may try RP some day. Been using Red Line for about 3 years now in the Boxster. 5W40. It costs about $9.00/quart. Plus shipping. RP is comp in $$.

This may help too:

http://royalpurple.findlocation.com/

My local AutoZone now has RP 5W40 and 10W40 stocked for 9.49 qt...

I'm going back and buy a case (sometimes they give case discounts).

I'm now using the Royal Purple 5w-40 as well. I was able to order a case through my local NAPA. It's pretty spendy, but I think worth it. Before I switched, I placed a call to their tech support, and they were very helpful, and answered all my questions.

Because the 5w-40 is ACEA A3\B3 rated, I guess the additive package had to come from Europe.

my local autozone has Castrol syntec $25 for a case of 5, $7 each for M1 and $9 for RP.
hmmm....I'm tempted to go with the Castrol and change it a little more frequently than the RP.
How long is the shelf life for motor oil? I see oil prices moving higher and sooner than most folks expect. My local pump just jumped 7% in a week for high test.
Wonder if stocking up is smart.

If you haven't read this before, do yourself a favor...

http://www.lnengineering.com/oiltest.pdf

Nice report
 

I guess I will use the Valvoline in my wife's car...

Why, I wondered, have so few people commented about this test result? Do people not put much stock in the testing protocol and, hence, the results. Those results would seem to indicate we shouldn't be using oils such as Red Line, Elf, Mobil 1, and Castrol, oils that are often popular with folks on this forum.

Just playing devil's advocate here...I don't profess to know a ton about the subject, though I have been reading a fair amount online (to the point where my head's swimming and I think I've gone slightly cross-eyed!)

There are comments all over the web, and not just on Porsche sites. There are a lot af different agendas. One being a hesitance to go outside factory recommendations.

Well, I'm off warranty and was still reluctant. I probably would've gone with M1 5w-40 that is on the approved list had it been available in US.

The research is overwhelmingly clear. There are better oils that the factory and others are reluctant to recommend for a lot of reasons. Like the Factory being politically and environmentally EU correct. Another being lawsuits when an engine fails using a non-factory-recommended that was recommended by Party of the First Part, One Snake Oil Salesman of XYZ, LLC.

As most sellers say, "Do the research and decide what you need." Or maybe even "I would not put Mobil 1 in My Engine."

To which I say: I did, I did, and I won't. :cheers:

Back On Topic
 

This post started as a Mobil 1 rebate string, but seems to have gone all over since then.
So, I'll bring it back. It took 10 weeks, but I got my rebate check today for two rebate offers. Got my check for $20. Thanks Mobil!!

Cool.... I had to get oil for my Box and 996. So I sent in 4 rebates using two addresses. I'm hoping that works and that I get $40 back!!! :p

Kirk