What does it idle at now? You want it around 950 rpm for proper topend lube. The dealer can chage it for you but adjusting the screw want work for long sice it may through a code.
If it sounds too high, it's about right. If it sounds way, way too high, then maybe you have an issue. If it sounds right, you also have an issue--it's too slow for good lubrication and cold starts. How's that for seat of the pants tuning?