Y'know, it never hurts to check the obvious. I had been wondering about my gradually declining fuel economy on my 300D. Working on the brakes for what I thought was a simple pad and rotor change turned up the fact that I had a mildly frozen caliper. I hadn't felt that in my driving at all and was genuinely surprised.. Changing that out, plus getting a fresh 4-wheel alignment, improved my fuel economy by 3 MPG.
...Don't even get me started on the impact of tire age/tire pressure. You would think that hotter temperatures would increase tire pressure and decrease rolling resistance, but it hasn't worked that way for me. Makes me wonder if the hotter temps = lower air density, so I'm not getting as much power out of the engine? However, my motor hasn't been regulated anywhere near the levels at which you've set yours.
--Conrad J.
On 6/24/2020 11:24 AM, Nate vwnate1@yahoo.com [diesel_mercedes] wrote:
Thanx Mark ;
This same car used to get 27 ~ 29 MPG in town and 30 ~ 32 MPG's traveling the same routes it does to - day .
I wish I knew what to change/adjust/fix .
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Posted by: Conrad Jacoby <conrad.jacoby@gmail.com>
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