http://dejong947.com/audi/tsb/audi.tb.17-05-01.pdf
heres your list, should be in your glovebox aswell.

 

CostCo has Mobil 1 5-30w for about 32 bucks a case. However, I don't see it on the list? Mobil 1 0-40w is though. Of course CostCo doesn't carry it.

 

the 5w is not as good in winter as 0w, and the w30 isnt thick enough for high temperature turbos as the w40 is. im sure you wont ruin your car by using that, but that is the reason its not on the recommended list.

 

Because you shouldn't use it. And it's not that great anyway.

 

5w-40 Mobil1 Turbo Diesel Truck oil..

Use to be the standard recommended oil until the EPA thought it had too much ZDDP.. 0w-40 Mobil1 has the lesser amounts of ZDDP, but if my car wanted the extra ZDDP before, why wouldnt it want it now?

I stick with the 5w-40..

Purolater Pure One for the filter...

 

I have a 2.8 30v and not turbo. Is it still not a good choice?
I drive frequently between San Diego and Vegas about 2-3 round trips a month.
I'd get the 0-40 if the price wasn't bad. Hard to beat CostCo.

Where do you guys get 0w-40 and at what price?

 

ZDDP was used in older engines with push rods to protect the tappet from impact of the cam lobe. if you have an oil leak, burning ZDDP increases catalytic converter clogging as compared to if you were burning oil with less or no ZDDP.

though its really not an issue in OHC engines, and oil isnt even actively circulated over the top of the lifter anyway. the only instance where a newer car could benefit from lots of ZDDP is when the engine is freshly rebuilt and being broken in. also truck/deisel oils have different formulations for different fuels and engine operation, and carry different API certification. theres a reason that oil isnt on the list either.

 

What??

It holds an SM API rating... And, as I said, it was on their list until, 2004? When it was renamed from 'European Formula' to 'Turbo Diesel Truck' and the 0w-40 was created. I have both Audi pdf's here some where.... And, its not like its tons of ZDDP or detergents, just what the SH/SL specs called for...

Does it eat catalytic converters? Sure it can (and why I dont run Royal Purple which has 3-4x as much). In fact, the current SM spec came about because the Feds required the OEMs to warrant emissions stuff up to 150k miles.. easiest way to get their was to pull the ZDDP, valve train failures be damned. And believe me, they had a rash of failures after the change.. but it was cheaper than fixing emissions plus any fines.

 

Here ya go... it actually has only 100 more of each... 1200 ppm was concidered the low side when my car was made..

http://www.mobil.com/USA-English/Mot...duct_Guide.pdf

 

There seem to be some very knowledgeable guys here, so maybe you have an opinion on this.

The car is a naturally aspirated 1.8 and lives in the very mild climate of Ireland where -5C is extremely rare. I use part synthetic 10w40 Mobile 1.

Would there be a benefit in moving to a fully synthetic or different grade? I would appreciate reasons, facts and experience over marketing hype please.