Originally Posted By: tig1
Originally Posted By: fdcg27
M1 OW-40 was my first thought with your first post.
Other than being a lot quicker and faster than your usual daily driver, what do you think of this little Benz?
Should be very pleasant as compared to a four cylinder Fusion.
If you'd like, give us the backstory on why you'll be driving this little Mercedes long enough to be worried about changing its oil.
Sure. There are 4 MB's in my daughters family, and this is my grand daughters, as her and my daughter and SIL are in calif for the week. My wife is looking after the 4 other GC, and has the Fusion. The Focus is being used by another family member, so I was offered the MB for the week. My SIL uses M1 oils but typically uses M1 10-30 in all his engines, except the MB diesels. They also have an Infinity full size SUV and two Ford F350s with gas engines, one with a dump bed. As for the oil inquiry, I want to give my SIL the scoop on the C300 as I'm sure it has M1 10-30 in the sump. Really, the Fusion is as tight on the hyw as the MB and has a slightly better ride, but the MB has the HP and is fun to drive. The Benz has 47K and my Fusion has 209K. Also I noticed the Fusion is slightly "quiter" at Hyw speed than the C300. However the Benz has more goodies, but OH! how I hate the premium fuel rip off.
I believe the only M1 that meets MB 229.5 is 0w40. There's also some 5w40, but that's only at the dealer and regular 0w40 is fine. I'm surprised no one mention Castrol so far, they have 0w30 and 0w40 in MB 229.5. They also have BMW LL-01 which Mobil 1 had at one point, but lost recently.
As for premium, you can mix 1/3 87 with 2/3 93 if you have that to get 91 which is all that it requires. Otherwise if you just have 91, stick to 91. There are a few people out there who claim that they run regular on their engines all the time and count on the knock sensors if there's any issues. Not that brave myself to try that on my E-350.