Engine oil …. but which to choose?
 

What oil are you using …. Mobil 1 certainly …. but which one?

Mobil 1 – Peak Life 5W-50 ….. fully synthetic? (old name: Rally Formula) and which oil to use to break-in a renovated engine? …..

Just had a B service done. Dealer used Shell 5W-40 synthetic. Basically any oil that meets M-B spec is acceptable - does not have to be Mobil 1.

I use the Shell Rotella 5W-40 synthetic in the blue jug in everything I own.

Mobil 1 0W40.

ditto on Mobil 1 OW40. As I recall there is a different spec oil by M-B for the AMG cars.

0W40 here too. Although, my SL goes to bed for the long Wisconsin winter and will almost never get started in temps below 50 F. I suspect your SL won't get fired up much in the middle of the Swedish winter either. :)

mobil one 0w40- why experiment or change what the car comes from the factory with?

the recommendation for mobil one 5w40 esp used in gasoline engines burning 10% or more ethanol has been withdrawn

mobil 1 ow-40

Ha ha ha Curt ........ not going many RPM right now ...... and you know that .... ha ha ha

but for oil and all other fluids ..... found this:

http://www.startekinfo.com/StarTek/o...stedDocId=9511

The viscosity and temperature chart is very interesting. Thanks for posting. I suppose not going many RPM is the only fool proof way of ensuring these little monsters don't break :)

Mobil 1 or Fuchs 0w40

Liqui Moly 5w40 fully synthetic

Mobil 10W40

I use Mobil 1 0W40 and from what I've seen on Bob's the oil guy forum it seems to be about the best viscosity Mobile makes for street cars. I'm sticking with it unless my UOA comes back with concerns. It's hot year round in my neck of the tropics so a thicker oil may be preferred. I'll know soon.

Les

Thread steal. My guy. Ha.

There is a very detailed oil thread on c63 forum check it out.

LiquiMoly Leichtlauf 5w40

Mobil 1 5-40m The dealer puts in , i think this is the factory oil

Wrong oil. The recommendation for 5w40m has been withdrawn for gasoline engines running on gasoline with over 10% ethanol content.

So what is the dealer sposed to put in? I do live in florida were its death hot most of the year

The dealer is supposed to put mobil one 0w40 in your sl65.

Honestly the 5w40 oil is prolly not a problem either, especially in fl, but it is not what the mercedes recommendation is for your car. As a matter of fact the mobil one 5w40 oil is specifically not recommended for your Amg.

This is a very interesting discussion because of the potential wearing of the cams and flat tappets on the M156 SL63 engine. I don't know if the SL55 engine has a similar cam and lifter setup.

I have been told that the official oil recommendation for AMG engines is now 5w-40 Mobil one Formula M non ESP oil and no longer 0w-40 Mobil one Euro formula. Now the question is how much zdp and phosphorus does the 5w-40 formula M have? Does anyone know? I know the 0w-40 has 1000ppm of both zdp and phosphorus.

I believe the 5w-40 recommendation is because it won't drain out of the lifters as easily or quickly.

Since my car is still under warranty I am going to stick with the Mercedes recommendation. If it wasn't I would look for an oil with higher zdp and phosphorus levels. Something like Brad Penn 5w-40.