I have a 94 Dodge Shadow with the 2.2L TBI engine It has been setting all summer I start it from time to time but the injector went bad a coated my plugs with carbon so Im gonna seafoam it and was wondering should I change the oil afterwards before I drive it I have Mobil 1 HM 10w30 in it with maybe idle time and 5 miles on the OCI Im gonna pour the seafoam into the throuttle body 1/3 of the can then pour enough in it to flood it out like the online video says the start it up after letting it set for 5 mins . will this harm my oil?