99WhiteC5Coupe
Full Access Members
Ah -now I'm right behind you with 76K on my (last month) new to me '17. I really like this rig and it feels like everything I've been looking for as a mature adult. It's RWD only with a 3.73 optional gear and nice OEM 20" wheels. Having that odd little idle shudder and a "more odd" chuggle when coasting (deceleration) down between 30 and 20mph -feels like the 3rd gear lock up is trying to decide what to do. My wife drievs it occasionaly and says "stop trying to find something wrong". Last week I changed plugs but got lazy and handed my new Motorcraft SP580 plugs to a fairly sharp Firestone mechanic and said "be sure to gap them at thirty, no more" (magic marker on the boxes too). Didn't seem to help the idle -maybe slightly. Yesterday I cleaned the 3 MAP sensors -same result there. Am leaning toward a 5 Star for towing a 25' RV but don't want to tune until I'm solid on the idle and coasting oddities. Also want to know what brands of oils you're using in the engine and rear diff. The Ford dealer I bought it from changed oil and the little window sticker says 5W20 don't know if it was dino or syn. I removed a pint and added Liqui Moly MoS2 anti-friction and then will start running whatever everyone here thinks best. Want to keep this rig on the road for a long time. Reply when you can. Mike
Ford recommends 5W30 oil, not 5W20.
Several times the selling/servicing Ford dealership for my 2015 Ford Expedition Limited 4x4 put the wrong oil in engine, and I had to take it back. One time the service advisor said “his guys” weren't’ used to the 5W30 requirement yet. I’m assuming he meant his “factory trained technicians” that “know my vehicle best”.