Just picked up some Syn Blend-service pro for my 117K miles on 3.4 T-100 Toyota , from my local Indy parts Store, they also stock full syn, asked for 5qts or litrs. size but not stocked at this time, will ask them if they can order it. Oh they charged me 3.45 a qt. My question to you guys, is Engine Restore a good product to add when OCs?? Thanks.