Question: is it safe to pump full-strength Berryman #0116 B-12 Chemtool directly thru removed fuel-injectors (total ~ 3 ounces per injector) via a medical plastic syringe ? I have the 6 fuel-injectors removed from my ’94 Bonneville and made a simple 9-V momentary-switch circuit to pulse a cleaner chemical thru the injectors via a 20cc medical plastic syringe and rubber vacuum hose … I am thinking of using Berryman #0116 B-12 Chemtool as the cleaner but am concerned that the B-12 will degrade the syringe (then flowing unseen melted plastic thru the injectors). Apparently Polypropylene is the plastic in medical plastic syringes: https://answers.yahoo.com/question/index?qid=20110531131955AAlUh7y Found this info regarding “…B-12 is inert to some plastics like polyethylene and nylon but devastating to others like ABS and polycarbonate …”: https://www.berrymanproducts.com/solution-central/b-12-and-plastic-parts/ Found this info which states “…Polypropylene is stiffer and resistant to chemicals and organic solvents compared to polyethylene …”: http://www.globalplasticsheeting.com/our-blog-resource-library/bid/86417/Polypropylene-How-is-it-different-from-Polyethylene