Monky

Hi all,
Have a SL55 AMG, modified, will be running circa 600hp over the summer.

I know 0w40 Mobil 1 is the stock oil choice but the car gets driven very hard and will be visiting nurburg, santa pod & various circuits. It's only a weekend car but gets driven hard.

I want a slightly higher viscocity at operating temp to protect the engine due to driving style so was considering a 0w50 or 5w50, Mobil 1 make a 0w50 but it's hard to get here. I can get 5w50 Valvoline VR1 Fully Syn off the shelf for around £80.00 a gallon.

Just wanted to see if anyone is running higher viscoity oils than stock in there 55 AMG.

Let me know your thoughts, the Valvoline VR1 is run in quite a few top end cars like M5/M6 etc.

Cheers all,

Toby

e55amgrocket

VR1 is good oil. I have used Royal Purple in the past and actually watched an oil change with Royal Purple on a dyno make 9hp on back to back pulls over mobil 1

BenJ

A 9hp increase in a back to back dyno would be more likely due to other variables other than oil. I routinely see variences greater than that with no changes at all. To keep the topic on track, the oem oil will be fine, just shorten your oil change interval.

93RX7LSX

We've seen good results from redline, amsoil, mobil 1, and castrol.

Jakpro1

I am not so much worried about the engine as those brakes. They are nice and big but expect to get the red light of death after an hour or so of hard usage. Brakes overheated..pull over.

Mobil 1 stock all the way I say. If you are that worried about it, do what race teams do. Change it constantly. Perhaps couple times a day if that will make your more comfortable. I think it's a waste personally. You got guys in Ferrari and Lambos going coast to coast flat out in outlaw runs using Mobil1 and they run just fine.

Oh and prepare at the end of the day for your new rotor color.

Swear to you, it will look like this after it glows red on the track.

Article of a guy who beat the snot out of it on track here

Sher Judge

Mobil 1.

Yacht Master

Mobil 1 0W40 is more than you need for racing and street.
If the car has no cats then Mobil 1 0W50 racing.

http://www.prnmag.com/gear/45-gear/4...cing-oils.html

vipermike

+1 0w 50