Don't run the Euro formula 0w-40, folks! That is an ACEA A3/B4, which is a high SAPS oil. Sulphated Ash, Phosphorus, and Sulphur. They are good for older engines, but bad for your emissions. They don't work well in direct injection motors, either. The 0W-40 oils we need for our motors are an ACEA C3 oil, which is a mid-SAPS oil.
Newer vehicles with DI and newer emissions require this lower level of SAPS to save your cats and motor. The Mobil 1 0W-40 oil that you could buy for your Hurricane motor is the Supercar variant, intended for the Corvette. M1 has gotten really coy about posting any specs on their Supercar blend oils, but the 0W-40 is an ACEA C3 oil equivalent.
M1 grew tired of all their Corvette owners buying 5qt jugs of 5w-30 at Walmart for $25 so they concocted with GM and changed the recommended viscosity to 0W-40 in the middle of the C7 production run. They even said you could run the 0W-40 all the way back to when their first LS motors came out in Corvette in 1997. A few years later, M1 came out with their Supercar label to help keep the cost up, and they don't sell that oil in 5qt jugs, let alone even at Walmart.
ACEA C3:
Stable, stay-in-grade engine oil with mid-SAPS Level, for aftertreatment system compatibility.
Intended for use at extended oil drain intervals in passenger car and light-duty gasoline & DI
diesel engines designed for engine oils with HTHS viscosity of minimum 3.5 mPa⋅s.
ACEA A3/B4:
Stable, stay-in-grade engine oil intended for use in passenger car and light-duty gasoline &
diesel engines and/or for extended oil drain intervals where specified by the engine
manufacturer.
For the money, and given the 6k mile OCI's on our RHO's, stick with the Pennzoil Ultra Plat and stock up an oil change or two ahead of time when you can get the oil on sale!
