The new 229.51 MB 5w40 IS NOT DELVAC 1, NOR IS IT "HEAVY DUTY TRUCK AND SUV"

Mobil 1 DID re-brand their Delvac 1 as "Heavy Duty Truck and SUV" oil, which is DIFFERENT than plain-old "Truck and SUV" (Standard Delvac 1300)

NEITHER OF THESE OILS IS THE NEW 229.51 5W40!!!!!!!!

The oil MB is using is an EXCLUSIVE oil

I'll let MBDOC back me up on this

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former: 83 300D, 97 C230, 93 400E

current: 08 C300 Luxury , 92 500SL