imnprsd wrote: ↑Sat Dec 10, 2022 6:33 pm
Why do you think you need an additive? Are you concerned about loss of HP or just trying to "take care of your engine?"
From a performance point of view, in my 2004 FX45, with 110,000 miles, I found replacing the Throttle Position Sensor (TPS) and spark plugs made a noticable difference. You should search this forum for key words and then decide what priority to spend your money. Including a transmission ATF change.
Thank you for the help. It is for engine care and cleaning. I did try a search, but came up empty.
The engine has 134,000 miles, and has had regular oil changes. I just did a transmission fluid change, and spark plugs as well.
I just want to keep the engine running in tip top shape to make it last past 200,000 miles, as I love the vehicle.
I have not yet tackled the TPS yet, and will do that next. Thanks for the advice. I appreciate it.