RIDETOEAT

I just picked up a new 2008 155 hp speedster this last Thursday and we had a ball with it. It is a tender/toy when the big boat is too much to deal with. We took off for the first outing and headed up river and ran 80 miles by the time we got back to our marina and we ran off the 10 hours in just " 4 Days " as of this evening. I have 3 or 4 questions as follows.

Thanks in advance....

#1 Is the depth gage add on worth it and is it a good one, does it work well and at speed ???

#2 I have read the few speed tricks and will do those in time but I am looking for about 2 mph that is always there in the form of maybe an impeller change or hard parts somewhere. I am not a speed junki or I would have just bought the 255 boat but rather just wanting to mysteriously and consistantly be a couple of mph faster than a buddy. You know just enough to make him scratch his head !!!

#3 Is the solas impeller really worth anything on top end ????

#4 Thinking of pure synthetic oil in this non SC 155 hp. engine ??? ANY THOUGHTS ??

#5 RainX -vs- wax on the bottom ????