I live in the Boulder, CO area (Lyons, about 12 miles north) and run 91. (It's the sea level equivalent of 93).
We're going to replace spark plug wires. The 90* plug wires were loosening up as they were vibrating to the header bolts and pulling off, but we have winter now.
Trying to find the source of the
oil leak. It is puddling on the ground. I think some or all of it is blow-by from the valve covers K&N filters.