Quote:
Originally Posted by t walgamuth
I've had at least 20 123 diesels.
Freshened engine including injectors. 300d euro spec na motor. 307 diff. five speed od transmission running 55 to 60. With that combination we topped 40mpg highway a few times.
I don't see how it would be possible with stock gearing and an automatic. I would suspect a slipping odo or some other measuring inaccuracy. Hyper miling might do it or running about 40 mph highway.
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This is a Euro spec 300D NA motor with a fully freshened engine and mechanicals. I typically drive at 55-65 mph. I've never been able to exceed 36-37 mpg US highway. As shared earlier, this drops to 23mpg in London city conditions