Mixing New Mobil 1 With Other Motor Oils
Question Can I mix the new Mobil 1 SuperSyn™ with the old Mobil 1?
-- Eric Walkinshaw, Clifford, Indiana
Question Yes, Mobil 1 with SuperSyn™ is fully compatible with any of the past Mobil 1 motor oils, including Mobil 1 Tri-Synthetic™. Mobil 1 with SuperSyn™ is also compatible with conventional motor oils, semi-synthetic motor oils and other synthetic motor oils, should it be necessary to mix them.
great ill have to do it... i feel like i need 5w30, because when i leave my car out all night 20 to 30 degrees, i get a little knockin' (mobil 1 10w30) even tho 20 30 degrees should be nothing to the 10w30...
I think occasional mixing of oils (especially within the brand) is fine. People do it all the time with no ill effects.
It's the people who think they are "building a better mousetrap" and improving on formulas by mixing who are kidding themselves.
--- Bror Jace