Power steering delete is planned. I'm also in the process of deleting my alternator. I'm selling an old MG Midget parts car tomorrow and will be using those funds to finally purchase a deep cycle battery to complete that project. I'll have to wait at least 3 weeks before I can start turning off the alternator though, since I want to get at least 3 tanks in running 60 PSI to compare it with my 45.4 MPG average at 45 PSI.
After the 60 PSI testing summer will pretty much have ended and temperatures will start dropping. A/C will no longer be used, which could effect the results. I'll have to wait until next summer to really see the results. I have been lucky to have very consistent weather over the months of July and August, so I consider the 7% gain from tire pressure to be accurate. It's actually a conservative number because my actual number is 4 MPG improvement after running 4 more tanks since this thread was started.
3 tank average at 30 PSI = 41.4 MPG
5 tank average at 45 PSi = 45.4 MPG
(4 / 41.4) x 100 = 9.6 % gain
