I bought a 2010 Prius with 160k miles on it three years ago, currently ~ 210,000 mi. When I first got the car I got 44-46 MPG (I live in the mountains, but I would sometimes get 50 or a little better when going down into the Central Valley or Bay Area). I now am getting 35-38. I have been reading the forums and have conducted the following: Replaced hybrid battery with a new one from Greentech Auto in Sacramento Cleaned intake manifold, EGR tube, and replaced EGR cooler with a used, clean one Replaced PCV valve replaced MAF sensor Run BG 44k fuel injector cleaner about 4 times (this causes a 1-3 MPG increase for the treated tank then goes back down) I also had significant problems with oil consumption which I believe is to do with clogged piston rings. Every time I change my oil I run the BG oil cleaner for 10-30 minutes. This has dramatically reduced oil consumption and I went from burning a quart every 1,000-1,5000 miles to now only burning about half a quart to a quart over a 5,000 mile oil change. Don't know if this is relevant information or not. In the future I will also be running Valvoline Restore and Protect to try and help address this issue. I have also replaced the tires with not hybrid specific tires. I am aware that this may affect the mileage a little but I didn't notice a large drop from when I got them. It was getting mid to high 30s before and after the new tires. Not sure how much this matters. How can I get back up to where I was when I got the car? Should I check check compression? See if the injectors need a cleaning or replacement? Appreciate any insight. Cheers
