First change was at 1200 miles, every 5K since.
The 911 is a totally different story- I'll only go 3K tops, so the zinc doesn't get too depleted.
The 911 is a totally different story- I'll only go 3K tops, so the zinc doesn't get too depleted.
It's an 85. RoW model imported by a doctor here in AZ and federalized here. My mechanic uses Valvoline VR1, 20W50.What year 911? I'm guessing some air cooled variant since you are concerned about zinc. What oil do you use in it? I have a 1986 911.