I have a 2011 Prius with 180,000 miles. I’ve noticed I need to add extra oil in between oil changes so it looks like I may have a case of some oil consumption. I don't know the specifics yet (how many quarts per mile). I’ve used the BG hybrid kit (https://www.bgprod.com/services/hybrid/) and maybe it worked a little, but I still find myself needing to add some extra oil. I’ve been reading through these forums and wanted to try a piston soak with Berryman’s B-12 Chemtool and I saw this video () and was surprised by how well this worked. I wanted to follow a similar process with my Prius, but since this is a hybrid that uses the MG to start the engine, I’m concerned about cranking the engine by hand. Is it safe to turn over the engine manually using the crank pulley? I guess I’m wondering if the HV system will care if the engine is rotated from where it last turned off. I would think I’ll just remove the spark plugs, pour in enough B-12 to cover the top of each piston, agitate it a bit by rotating the crank pulley bolt, wait a couple days, agitating occasionally, then suck out the remaining fluid, change the oil, then start it up. Is there anything else I should be concerned with? Is there a way to have the engine crank without trying to start to work the B-12 into the rings?