Brad Willis

Well, I took my TT in for my first service at 5000 miles yesterday. I told the Service Manager that I'd like to switch to Mobil1 and I asked if he could make me a "deal" on it. He said that he would do $3.30 per quart, which I thought was very fair.<p>When I picked up the car, I saw that they had put 5w50 in the TT. Mobil1 doesn't make a 5w50 oil. I called today, and it seems that they use Castrol Syntec instead of Mobil1. The Service Manager felt that the 5w50 offered a greater degree of protection, and Castrol was their de facto synthetic oil.<p>Now I must say that both the dealer and the service department have been very good so far, but I do have several questions.<p>1. Should I be annoyed that Castrol was used when Mobil1 was specified, or should I let that go as the dealer is already making me a good price on the synthetic?<p>2. Is the Syntec as good as Mobil1? Is it close? Is their any evidence one way or the other?<p>3. What about the 5w50 weight, does that seem reasonable? (I live in Southern California where it rarely gets cold, if that matters).<p>Thanks in advance for your comments! <br>

RickS

What dealer, Vasek tried that with me and I insisted on Mobil 1, just trust it more, it doesn't get cold enough here to need the 5W.

ErikR

The Audi dealer std. is Castrol (maybe they get a deal?). Mobil does make a 5w40 and a 5w50 (europe only). Neither are energy conserving oils (old II). They are the universal compromise oil for places like the Sahara with cold nights and hot days.<p>The price is good.<p>Syntec is excellent, comparable.<p>Regardless of uninformed opinions, 5w30 is the FACTORY SPEC!!! Unless you live and race in death valley, 5w30/10w40 are the ideal oils for you. Those who disagree with the above statement please check out thier manual, previous technical postings in the archives, and the Mobil 1/castrol/redline/amsoil websites. (Synthetic oil is NOT the same as straight dino oil) Paranoid owners use whatever your heart desires because facts will not have any influence on you.

kjk

I guess that wasn't as good a price as I thought. Oh well, Castrol is fine. By the way, one guy on the M5 board who lives in Germany and used to drive a 400hp M5 at 165mph for sustained periods on the Autobahn, swears by Castrol 5W50. Of course, it gets a lot colder in Germany than San Diego. <p>KJK 91 M5

alan t.

dfddd

English police

dfdd

ErikR

dfddd is NT? Nice email so we can take this LAME discussion offline. I would appreciate if you had read all of the last paragraph. Audi says dino 5w30 up to 90+ F, Syn far better at high temp stability than dino.

Jason Teller

My dealer is using 5W50 synthetic in my car

steve p

nt<br>

Ray Calvo

Read in a Porsche Club tech article several years ago that Syntec was prone to breakdown more than Mobil 1. Caused me to switch from Syntec to Mobil 1 in my old 911.