Marshall Booth wrote: > Group IV or IV/V synthetic oil (all the Mobil 1 oils are IV or IV/V > mixes) will increase cold cranking speed by 30-50% and low minimum start > temp by about 10 degrees (or a bit more) other things equal. >
Marshall, I'm curious if you've heard any of the rumors that Mobil 1 has quietly switched to a group III synthetic. It's been making the rounds on another message board I'm on.
