Looking at Lubrizol's spider chart it would appear C4 covers C3 and only differs in exhuast after treatment compatability. That makes sence as C4 is essentially a lower Saps version of C3. I can't help but think it will not protect as well but thats not what the specs state.
So would a C4 oil work just as well as C3 in a C4 application? I realise the oil change interval may have to be lower.
So would a C4 oil work just as well as C3 in a C4 application? I realise the oil change interval may have to be lower.