I haven’t eliminated the EV system….however, having driven C’s for better than 600,000 miles combined (three cars) I’ve not experienced an MPG loss like this - WELL OVER 10mpg loss happened pretty much overnight - but not last night - LOL I have eliminated brake drag and wheel bearing issues. The car has new spark plugs and air filter. There is a noice that sounds similar to ‘traction control/stability control’ activation coming from the passenger front only when the ice engine is activated. At least that is where I believe it’s coming from. Also, when watching the onboard “home” screen it seems to get extremely poor mileage - like 35ish mpg at 65mph (history says it should be getting closer to 50 than 40 at those speeds). ThanksMuch, and happy new year
