Transmission fluid at 100k miles

[MeeLee]

I changed the cvt transmission fluid from my 2019 FFH at 105k miles to the Ford recommended oil, due to the fact that the cvt oil also lubricates the electric motor, so it's not regular transmission fluid.

 

Cost me about $336, which includes $56 for the oil itself.

 

The oil looked to be still in a good condition, meaning slightly off stock color.

 

After the oil change mpg went from ~42.6 to ~43.6mpg, which is an average gain of 1MPG or ~2.5%. This indicates that the lubrication properties of the oil definitely degraded over time. Had I waited 20 to 50k miles, the oil would have been much darker.

I would say, for hot south Florida weather, change the oil at 100k mile interval is a good idea.

 

Next up spark plugs. I'll go with the dealer recommended 125-150k miles.

usually you change them out every 100k miles, but the hybrid engine is usually kept under 2k rpm when driving (even on the highway), which means it has about 1/3rd longer life left compared to most other cars that regularly rev past 3k rpm.