GM adds new dexos R approved oils

[vagabond]

I am wondering why not always use 5W-50 in our CT5-V Blackwings if this is all true?

 

[SIR ICE]

It would appear that 15W50 Mobil Supercar oil is no longer available. They only list 0W40 and 5W50 now.

If GM engineering recommends 5W50 or 15W50 Mobil 1 for track use, who am I to question their engineering wisdom. I put well over 6,000 track miles on my ZLE Camaro with zero problems. I followed GM oil change recommendations for engine, trans, and diff. I had zero issues. Mind you I consumed 6 sets of brake pads, 12 bottles of SRF, and 10 sets of Goodyear 3Rs. I plan to do it all again in a BW.

THANKS GM for selling me such another awesome car for street and track use.

 

[Carguyshu]

I am wondering why not always use 5W-50 in our CT5-V Blackwings if this is all true?

GM would have to recertify emissions if they started recommending a different oil is likely the only reason they don’t suggest running the new 5w-50