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My guess would be that a 40w holds up against fuel dilution longer than at 30w since it starts out thicker. If Porsche uses low tension rings like VW, dilution could be a bigger issue than in other motors.

Originally Posted By: Bluestream Just bought some Canadian GC, and noticed the SL rating. USA castrol web site has 0W30 with SM rating. Looks like there are dumping the old stuff on us The website is wrong, GC has never been SM rated.

Originally Posted By: cryption I wish my 'zone sold the Valvoline 5w-40. The only place I can find it is Amazon and at $50 for 6qts it's not worth it. O'reilly, Checker, Schuck's, Kragen and NAPA can get it if it's not on their shelf.

Originally Posted By: UG_Passat Originally Posted By: glxpassat I believe Toyota/Lexus solved this problem by letting low pressure injectors spray a little gas on the valve like it's always been done, while still using DI for the majority of the gas charge. It seems like a very easy and...

I believe Toyota/Lexus solved this problem by letting low pressure injectors spray a little gas on the valve like it's always been done, while still using DI for the majority of the gas charge. It seems like a very easy and reasonable solution to me.

I wouldn't believe anything listed on the Castrol American site. Just look for VW 503.01, that's the long life high horsepower turbo spec and is used in the high performance Audi's. If it has that spec, you're at the top of the heap.

Originally Posted By: Quattro Pete Why couldn't it be 4? 4 doesn't meet VW 503.01. Number 1 is the right answer.

Originally Posted By: EricF I sell to people the mobil 1 0w-40 european formula across the board for the VW/Audi/BMW. That oil no longer meets the 503.01 high horsepower turbo spec for some Audi's, and I believe VW's W8 engine.

Don't know if they're still doing it, but contact Debbie - [email protected]

The gold came out in early 2005, long after the Porsche approval was gone.

Originally Posted By: felixthecat 502 is a current specification. http://oilspecifications.org/volkswagen.php Sure no longer used in europe.... so in "temporal" way it has superseded 504, but still a currently used oil specification. ( See PU 5w-40) 502 is still used in the US because we are...

Just buy a 5 quart jug of 15w-50 for topping off the half quart in the beginning, and throughout the oci. This will keep the viscosity inline as the oil becomes diluted by fuel. And it will mix with any brand if you decide to change.

Originally Posted By: Audi Junkie It's one of the easiest engines on oil that I know of. It may be with an automatic, but with a manual 5 speed it turns 3200 rpm at 80mph. My Honda's 3.5 v6 automatic turns about 2500 at that speed.

Wow, there's no telling how bad his gas mileage must have been with a filter that clogged. There is a spring loaded trap door in the floor of the air box that will open if the need for air is great enough, but it's unfiltered air. You may want to mention the fuel filter to him as well...

I have an 03 Passat 2.8. Any 502 rated oil will be fine, but if consumption is an issue, Pennzoil Platinum 5w-50 from NAPA has run great in mine, although it doesn't have the 502 approval. It will slow down the consumption after a few thousand miles. If he wants to stick with a 40w, the Pennzoil...

I have seen it advertised in gallons online somewhere.

This oil does not carry the VW 503 long life approvals, but it does have the VW 502 approval which means I can run it for 5k in my Passat. I would rather use the HST version with higher detergents though, just don't know where to get it.

Well, after about 6 weeks mine arrived today. Thanks Debbie and Pennzoil, now please just get somebody to carry it! There has to be a chain out there that wants to carry the only US Ferrari approved oil. I think I'm going to email/call Autozone and request they drop the Syntec 0w-30 and 5w-40...

Originally Posted By: oliverr871 And I don't know why people don't read my latest postings. Wow, are you really looking for help? Good luck, I certainly won't be.

I would pull the oil pan and check the oil pump, the screen may be clogged.