flycaster

I'll be doing my own oil change on the coupe and was wondering if different brand oils can be mixed. Last year Castrol EDGE 0W-40 (MB approved 229.3/229.5) was used. I have approximately 3 quarts left and was wondering if that could be mixed with 4 quarts of Mobil 1 0W-40 (Longlife-01, also approved by MB). It would seem to me that I can as both oils have the same specifications approving them for the C-300 2L turbo.

SorryAboutThat

The short answer to your question is yes, you can mix those two oils. The resulting frankenbrew won't be optimal because the add-packs aren't complementary. Just buy a 5qt jug of Castrol 0w-40 on Amazon for $23 and use that with the 3qts you have left over from last time. That would be best for the engine.
Btw, Mobil 0w-40 no longer carries LL-01 approval, and hasn't for several years. That is a BMW spec that the curent formulation of Castrol still meets.

Our cars need oils listed on sheets MB229.5 or MB229.6
https://bevo.mercedes-benz.com/bevol..._en.html#close

flycaster

Hey SAT, good to know that there are some few people on this forum that know a little something about these cars. I've already bought another 5 gallon jug of Castrol Edge 0-W40 at Walmart for $25. Walmart is really good for getting 5 gallon jugs of oil for a good price. BTW, in the past for my BMWs I've always used Mobil1 and would have used it for the C300's first oil change, but no one had it and I wound up getting the Castrol Edge as it had the same 229.5/229.6 spec as did the Mobil1.

And as for M1 no longer carrying the LL-01 spec, it could be that M1 still meets it but doesn't want to pay Mobil the licensing fee to have it on the label???